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 Service Source
Mac Pro (Early 2008)
Updated: 23 April 2008
© 2008 Apple Inc. All rights reserved.

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  • Page 1

     Service Source Mac Pro (Early 2008) Updated: 23 April 2008 © 2008 Apple Inc. All rights reserved.

  • Page 2

    Every effort has been made to ensure that the information in this document is accurate. Apple is not responsible for printing or clerical errors. Apple 1 Infinite Loop Cupertino, CA 95014-2084 + 1 408 996 1010 www.apple.com Apple, the Apple logo, and Mac Pro are trademarks of Apple Inc., registered in the U.S. and other countries.

  • Page 3: Table Of Contents

    Mac Pro (Early 2008) Contents Basics Overview 7 Identifying Mac Pro (Early 2008) Computers 8 Serial Number Location 8 Special Handling Instructions for Dual 3.2 GHz Configuration 9 Handling Instructions 9 Safety and First Aid Guidelines 10 Disposal Instructions 11...

  • Page 4: Table Of Contents

    Front Fan Assembly 51 Mac Pro RAID Card and Battery 56 Memory Cage with Rear Fan 62 Northbridge Heatsink 68 Processor Heatsinks for 2.8 and 3.0 GHz Processors 71 Processor Heatsinks for 3.2 GHz Processors 78 Processors, 2.8 and 3.0 GHz 87 Processors, 3.2 GHz 92...

  • Page 5: Table Of Contents

    Resetting the Logic Board 152 Power-On Self Test: RAM and Processor Verification 153 Diagnostic LEDs 154 Power Supply Verification Mac Pro Firmware Updates 159 Processor Heatsink and Processor Visual Inspection Instructions 161 Symptom Charts 164 How to Use the Symptom Charts...

  • Page 6

     Service Source Basics Mac Pro (Early 2008) © 2008 Apple Inc. All rights reserved.

  • Page 7

    Note: The 3.2 GHz configuration of the Mac Pro (Early 2008) computer uses a special coating on the processor heatsink and processor as was used on the Mac Pro (8x) processor heatsink and processor. The other 2.8 and 3.0 configurations of the Mac Pro (Early 2008) do not use this coating.

  • Page 8: Serial Number Location

    Location.” One other quick way to identify the computer is to open the side panel and inspect the memory cage. The Mac Pro (Early 2008) memory cage has a cross bar and looks like the following: Serial Number Location The Mac Pro (Early 2008) serial number is located on the configuration label, directly below the configuration description.

  • Page 9: Visual Inspection, Handling Instructions

    Special Handling Instructions for Dual 3.2 GHz Configuration The dual 3.2 GHz configuration of the Mac Pro (Early 2008) uses a special coating on the processor heatsink and processor to manage the temperature in the computer. To ensure proper handling and disposal of this material, please read the following information.

  • Page 10: Safety And First Aid Guidelines

    Remove and wash contaminated clothing. Seek medical attention if irritation or redness develops. Inhalation: Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Call a physician. Mac Pro (Early 2008)) Basics...

  • Page 11: Disposal Instructions

    Krytox grease and syringe, and heatsink gasket.) Pack this bag along with the failed module in the box that the replacement module came in, and return the box to Apple. Mac Pro (Early 2008)) Basics...

  • Page 12: Take Apart

     Service Source Take Apart Mac Pro (Early 2008) © 2008 Apple Inc. All rights reserved.

  • Page 13: General Information, Parts Requiring Enclosure Replacement

    For most take-apart procedures, it is recommended that you lay the computer on its side before removing or installing the part. For proper operation, however, Apple recommends that the unit be run in the upright position. The computer should never be operated on its side with the access panel facing down.

  • Page 14: Opening The Computer

    Unplug the power cord. Warning: To avoid damaging its internal components or the components you want to install, always unplug the computer before attempting any take-apart procedure. Put on an ESD wrist strap. Mac Pro (Early 2008) — Opening the Computer...

  • Page 15

    Remove the access panel and place it on a flat surface covered by a soft, clean cloth. Replacement Note: Make sure the latch is in the up position before replacing the access panel. If the latch is down, the access panel will not seat correctly in the enclosure. Mac Pro (Early 2008) — Opening the Computer...

  • Page 16: Hard Drives

    Depth: 5.7 inches (147 mm) • Height: 1.0 inch Important: To install SAS drives in a Mac Pro (Early 2008) computer, you must also install the optional Mac Pro RAID Card. Tools The only tool required for this procedure is a Phillips #1 screwdriver.

  • Page 17

    Part Location Procedure Make sure the latch on the back panel is up, so that the drives and carriers are unlocked. Pull the hard drive out of the drive bay. Mac Pro (Early 2008) Take Apart — Hard Drives...

  • Page 18

    Note: If you are formatting the primary drive, use the Disk Utility program on the Install Disk. Click on the Partition tab. Click on “Options” and verify GUID is selected if this is a bootable drive. Apply the change by clicking on the “Partition” button. Mac Pro (Early 2008) Take Apart — Hard Drives...

  • Page 19: Optical Drives

    Optical Drive Carrier and Optical Drives The Mac Pro (Early 2008) computer can accommodate two optical drives in the optical drive bay. If the computer has only one optical drive, it is installed in the top position. Note: To eject the drives, use the following: •...

  • Page 20

    Make sure the latch on the back panel is up, so that the drives and carriers are unlocked. Pull the optical drive carrier part way out of the computer. Mac Pro (Early 2008) Take Apart — Optical Drive Carrier and Optical Drives...

  • Page 21

    Note: If you are adding a second drive to the carrier, use the four screws stored on the back of the drive carrier to secure the drive to the carrier. Mac Pro (Early 2008) Take Apart — Optical Drive Carrier and Optical Drives...

  • Page 22

    Replacing the Optical Drive Carrier and Optical Drives Important: Use the original Apple cables that came with the computer when you install or replace the optical drives. If just one optical drive is installed, tuck the cables for the second drive out of the way.

  • Page 23

    Memory (FB-DIMMs) and Memory Riser Cards The Mac Pro (Early 2008) computer has two memory riser cards with a total of 8 memory slots. On each card, the slots are arranged as two banks of two slots each. The computer comes with a minimum of 2 GB of memory, installed as a pair of 1 GB fully buffered, dual inline memory modules (FB-DIMMs) in two of the DIMM slots.

  • Page 24: Preliminary Steps

    Memory from older Macintosh computers is not compatible with Mac Pro (Early 2008). Important: For proper operation of Mac Pro (Early 2008) computers, Apple recommends using only Apple-approved Mac Pro (Early 2008) FB-DIMMs. Refer to GSX for Apple FB-DIMMs service part numbers.

  • Page 25

    DIMM side up on a soft, clean cloth. Open the ejectors on the DIMM slot by pushing them out to the sides, and remove the DIMM from the riser card. Mac Pro (Early 2008) Take Apart — Memory (DIMMs) and Memory Riser Cards...

  • Page 26

    DIMM down until the ejectors snap back up into place. Warning: FB-DIMMs carry heatsinks on either side of the DIMM. Never attempt to remove the heatsinks from the DIMMs. Doing so could damage the DIMM. Mac Pro (Early 2008) Take Apart — Memory (DIMMs) and Memory Riser Cards...

  • Page 27

    PCI Express expansion slots. Important: Graphics cards from previous Power Mac G5 models are not compatible with Mac Pro (Early 2008) models. In addition, Mac Pro (Early 2008) graphics cards are not compatible with previous models. Important: Combined maximum power consumption for all four PCI Express slots must not exceed 300 W.

  • Page 28

    This procedure explains how to remove a standard card and a card that includes a booster cable. Before you can remove either type of card, however, you must first loosen the two captive screws that secure the PCI bracket to the enclosure and remove the bracket. Mac Pro (Early 2008) Take Apart — PCI Express/Graphics Card...

  • Page 29

    • Pull the card gently to see if it is properly connected. If it resists and stays in place and its gold connectors are barely visible, the card is connected. Mac Pro (Early 2008) Take Apart — PCI Express/Graphics Card...

  • Page 30

    Holding the card by the top corners, gently pull up the card and remove it from its expansion slot. If you are replacing a booster cable with a new one, disconnect the cable from the card. Mac Pro (Early 2008) Take Apart — PCI Express/Graphics Card...

  • Page 31

    PCI slot 1 to the lower connector. Connect the booster cable for a card in PCI slot 2 to the upper connector. Replacement Note for Card Using Two Booster Cables: Connect both cables to the two auxillary power connectors. Mac Pro (Early 2008) Take Apart — PCI Express/Graphics Card...

  • Page 32: Power Supply

    Hard drives and hard drive carriers in drive bays 3 and • Optical drive carrier and optical drive • Any PCI Express cards that block access to the power supply mounting screw Part Location Mac Pro (Early 2008) Take Apart — Power Supply...

  • Page 33

    Replacement Note: Replace the cover at an angle so that the tabs engage with the slots in the media shelf. Then lower the cover into place. Mac Pro (Early 2008) Take Apart — Power Supply...

  • Page 34

    Release the four power supply cables from their hook-and-loop fasteners on the enclosure. Depress the locking latch on each cable connector and disconnect the four power supply cables from the four connectors on the power harness cable. Mac Pro (Early 2008) Take Apart — Power Supply...

  • Page 35

    The power receptacle must align with the opening in the enclosure’s back panel and the four screw holes in the power supply must align with the screw holes in the media shelf. Mac Pro (Early 2008) Take Apart — Power Supply...

  • Page 36: Power Supply Fan

    Hard drives and hard drive carriers in drive bays 3 and • Optical drive carrier and optical drive • Any PCI Express cards that block access to the power supply mounting screw • Power suppl Part Location Mac Pro (Early 2008) Take Apart — Power Supply Fan...

  • Page 37

    Using needlenose pliers, pull out the four grommets that mount the power supply fan to the media shelf divider. Note: You may find scissors or wire cutters useful in snipping off the grommet heads. Mac Pro (Early 2008) Take Apart — Power Supply Fan...

  • Page 38

    Rotate the fan and remove it from the enclosure. Mac Pro (Early 2008) Take Apart — Power Supply Fan...

  • Page 39

    Connect the cable to the logic board. Rotate the fan into place flush against the media shelf divider. Make sure the back of the fan faces the divider, as illustrated. Mac Pro (Early 2008) Take Apart — Power Supply Fan...

  • Page 40

    Then pull to secure the grommet and detach the excess threading tail. (The tail is notched to break off at the correct place.) Repeat for the other three grommets. Mac Pro (Early 2008) Take Apart — Power Supply Fan...

  • Page 41: Airport Extreme Card

    The only tool required for this procedure is a magnetized jewelers Phillips #1 screwdriver. Preliminary Steps Before you begin, open the computer, and lay it on its side with the access side facing up. Part Location Mac Pro (Early 2008) Take Apart — AirPort Extreme Card...

  • Page 42

    Procedure Remove the two AirPort Extreme card mounting screws. Lift the AirPort Extreme card a short distance from the logic board. Disconnect the AirPort antenna wires from the card. Mac Pro (Early 2008) Take Apart — AirPort Extreme Card...

  • Page 43

    Note: If you are not replacing the AirPort card, cover the connectors on the AirPort antenna wires with Kapton or other non-conductive tape to prevent them from shorting out components on the logic board. Mac Pro (Early 2008) Take Apart — AirPort Extreme Card...

  • Page 44: Bluetooth Card

    The only tool required for this procedure is a magnetized jewelers Phillips #1 screwdriver. Preliminary Steps Before you begin, open the computer, and lay it on its side with the access side facing up. Part Location Mac Pro (Early 2008) Take Apart — Bluetooth Card...

  • Page 45

    Note: If you are not replacing the Bluetooth card, cover the connector on the Bluetooth antenna wire with Kapton or other non-conductive tape to prevent it from shorting out components on the logic board. Mac Pro (Early 2008) Take Apart — Bluetooth Card...

  • Page 46

    Preliminary Steps Before you begin, open the computer, lay it on its side with the access side facing up, and remove PCI Express cards that block access to the battery. Part Location Mac Pro (Early 2008) Take Apart — Battery...

  • Page 47

    Important: Batteries contain chemicals, some of which may be harmful to the environment. Please dispose of used batteries according to your local environmental laws and guidelines. Mac Pro (Early 2008) Take Apart — Battery...

  • Page 48: Processor Heatsink Cover

    No tools are required for this procedure. Preliminary Steps Before you begin, open the computer, lay it on its side with the access side facing up, and remove 12-inch PCI Express cards. Part Location Mac Pro (Early 2008) Take Apart — Processor Heatsink Cover...

  • Page 49

    With your fingers still under the cover’s bottom lip, lift the cover straight up to release the remaining tabs and magnets under the front face of the cover Remove the cover from the enclosure. Mac Pro (Early 2008) Take Apart — Processor Heatsink Cover...

  • Page 50

    Replacement Note: When reinstalling the processor heatsink cover, make sure the tabs on the underside of the cover align with the slots directly below them. (The slots are on the front fan and memory cage on either side of the heatsink cover.) Mac Pro (Early 2008) Take Apart — Processor Heatsink Cover...

  • Page 51: Front Fan Assembly

    Before you begin, open the computer, lay it on its side with the access side facing up, and remove the following: • Hard drives and hard drive carriers in drive bays 1 and • Any 12-inch PCI Express card • Processor heatsink cove Part Location Mac Pro (Early 2008)) Take Apart — Front Fan Assembly...

  • Page 52

    Using a long-handled, magnetized #1 Phillips screwdriver, remove the screw at the top rear of the front fan assembly that mounts the assembly to the logic board. Remove the second Phillips screw at the bottom front of the assembly. Mac Pro (Early 2008)) Take Apart — Front Fan Assembly...

  • Page 53

    Place one hand on each end of the fan, lift straight up, and remove the fan from the enclosure. Replacement Note: Before re-installing the front fan assembly in the enclosure, make sure that the fan cables are routed correctly in the fan channel. Mac Pro (Early 2008)) Take Apart — Front Fan Assembly...

  • Page 54

    Replacement Note: When lowering the front fan into the enclosure, slide the guide on the base of the fan assembly into the channel on the speaker assembly. Mac Pro (Early 2008)) Take Apart — Front Fan Assembly...

  • Page 55

    Also make sure the latch on the inside top left edge of the fan assembly engages with the slot on the inside lip of the enclosure. Then press down until you hear the fan click into place in the connector on the logic board. Mac Pro (Early 2008)) Take Apart — Front Fan Assembly...

  • Page 56

    Mac Pro RAID Card and Battery Note: If a Mac Pro RAID Card is installed in a Mac Pro (Early 2008), the standard iPass cable routing has been changed so that the cable connects to the card, rather than to the logic board.

  • Page 57

    Once the replacement card is installed, pull on it gently to check that it is properly connected. Mac Pro (Early 2008) Take Apart — Mac Pro RAID Card and Battery...

  • Page 58

    Holding the card by the top corners, gently pull up the card and remove it from its expansion slot. Note: The Mac Pro RAID Card must always be installed in slot 4. Mac Pro (Early 2008) Take Apart — Mac Pro RAID Card and Battery...

  • Page 59

    Note: You may find it helpful to use a small, flat-blade screwdriver to release the cable connector. Depress the rear edge of the silver-colored latch on top of the connector. Remove the card from the enclosure. Mac Pro (Early 2008) Take Apart — Mac Pro RAID Card and Battery...

  • Page 60

    212° F (100° C). Stop using the battery if it appears damaged in any way. Replace the battery only with an Apple-authorized battery for this computer. Dispose of used batteries promptly according to your local environmental guidelines. Mac Pro (Early 2008) Take Apart — Mac Pro RAID Card and Battery...

  • Page 61

    Note: System Profiler does not display the serial number for the Mac Pro RAID Card. You can find the serial number by checking the serial number sticker on the back of the card.

  • Page 62: Memory Cage With Rear Fan

    Before you begin, open the computer, lay it on its side with the access side facing up, and remove the following: • PCI Express card installed in slot • Any 12-inch PCI Express card • Processor heatsink cove • Top and bottom memory card Part Location Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 63

    Rotate the computer so that it is standing vertically. Using a magnetized short-handled or right-angled jeweler’s #1 Phillips screwdriver, carefully remove the two short screws that mount the memory cage to the bottom panel of the enclosure. Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 64

    Using your forefinger, reach below the fan and release the latch nearest the logic board. Using a flat-blade screwdriver, release the two latches nearest the front of the computer. Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 65

    Slide the memory cage and fan toward the power supply far enough that the cage clears the bottom edge of the enclosure. Then lift the memory cage and fan out of the enclosure. Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 66

    Replacement Note: Before installing the memory cage and fan, make sure all logic board cables below the cage are out of the way so that the cage sits properly and the cables are not pinched or damaged when you tighten the screws. Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 67

    Tighten the remaining captive screws, replace the two screws that mount the cage to the enclosure’s bottom panel, and reconnect the rear fan cable to the logic board. Mac Pro (Early 2008) Take Apart — Memory Cage with Rear Fan...

  • Page 68: Northbridge Heatsink

    • PCI Express card installed in slot • Any 12-inch PCI Express card • Processor heatsink cove • Top and bottom memory card • Memory cage with rear fan Part Location Mac Pro (Early 2008) Take Apart — Northbridge Heatsink...

  • Page 69

    Procedure Disconnect the Northbridge heatsink cable from the logic board. Using a long-handled, magnetized 3 mm flathead hex screwdriver, loosen the four captive heatsink mounting screws in the order indicated below. Mac Pro (Early 2008) Take Apart — Northbridge Heatsink...

  • Page 70

    Lift the heatsink straight up out of the enclosure. Replacement Note: When installing the heatsink, lightly tighten the mounting screws in the order indicated below. Then tighten the screws again in the same order to secure the heatsink. Mac Pro (Early 2008) Take Apart — Northbridge Heatsink...

  • Page 71

    Processor Heatsinks for 2.8 and 3.0 GHz Processors This procedure applies to 2.8 GHz and 3.0 GHz configurations of the Mac Pro (Early 2008). For the 3.2 GHz configuration, see the procedure “Processor Heatsinks for 3.2 GHz Processors.” Note: The heatsink for 2.8 GHz and 3.0 GHz processors requires thermal grease for proper operation.

  • Page 72

    Part Location Procedure Disconnect the 2-pin cable for the upper processor (CPU A) heatsink from the logic board. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 73

    Lift the heatsink straight up and out of the enclosure. Disconnect the cable connector for the lower processor (CPU B) heatsink. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 74

    Carefully tilt the heatsink so that it clears the bottom lip of the enclosure and then lift the heatsink out of the computer. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 75

    Spread the grease evenly across the square to a thickness of approximately 1 mm. Warning: Do not apply more grease than recommended. The grease must not overflow the heatsink and come in contact with the processor connector. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 76

    Note: Do not apply thermal grease to a new heatsink. It comes with thermal grease already in place, covered by a cap over the bottom of the heatsink. Before installation, remove the cap. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 77

    To secure the heatsink to the processor, again tighten the screws in the order indicated. Reconnect the processor heatsink cable to the logic board. Repeat steps 1–5 for the upper processor heatsink. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 2.8 and 3.0 GHz Processors...

  • Page 78: Processor Heatsinks For 3.2 Ghz Processors

    Processor Heatsinks for 3.2 GHz Processors The Mac Pro (Early 2008 Dual 3.2 GHz) computer uses a special coating on the processor heatsink and processor to manage the temperature in the computer. The silver-colored coating comes applied to the underside of the heatsink and the top of the processor.

  • Page 79

    Part Location Procedure Disconnect the 2-pin cable for the upper processor (CPU A) heatsink from the logic board. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 80

    Lift the heatsink straight up and out of the enclosure. Disconnect the cable connector for the lower processor (CPU B) heatsink. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 81

    Carefully tilt the heatsink so that it clears the bottom lip of the enclosure and then lift the heatsink out of the computer. IMPORTANT: Remember that you cannot leave the heatsink separated from either the upper or lower processor for more than 30 minutes.. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 82

    Replace the gasket if it shows obvious damage, such as cracks, folds, and broken-off surfaces, or if it is dislocated from the heatsink. The gasket is available through GSX as part of the Mac Pro Grease Kit, part number 076-1258.

  • Page 83

    • Use the cloth to carefully wipe the top edges of the processor one more time to clean off any remaining grease. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 84

    • Apply the top gasket included in the parts box to the top of the heatsink. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 85

    Lightly tighten the heatsink mounting screws in the order indicated below. To secure the heatsink to the processor, again tighten the screws in the order indicated. Repeat steps 1–4 for the upper processor heatsink. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 86

    Pack this bag along with the failed module in the box that the replacement module came in, and return the box to Apple. Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors...

  • Page 87: Processors, 2.8 And 3.0 Ghz

    Processors, 2.8 and 3.0 GHz This procedure applies to 2.8 GHz and 3.0 GHz configurations of the Mac Pro (Early 2008). For the 3.2 GHz configuration, see the procedure “Processors, 3.2 GHz.” Note: The steps in this procedure illustrate how to remove the lower processor (CPU B). The instructions are the same for removing the upper processor (CPU A).

  • Page 88

    Part Location Procedure Release the latch on the metal processor holder. Note: You may want to use a flat-blade screwdriver to help release the latches. Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz...

  • Page 89

    Rotate the top of the holder to the open position. Lift the processor out of the holder. Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz...

  • Page 90

    You must clean off the thermal grease from installed processors to see the speed. Replacement Note: Before installing a replacement processor, remove the protective cap covering the new processor’s connector. Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz...

  • Page 91

    Then lower the processor straight down onto the socket. Note: Unlike in earlier Power Mac G5 computers, replacing a processor in Mac Pro (Early 2008) does not require running Apple Service Diagnostic for thermal calibration.

  • Page 92: Processors, 3.2 Ghz

    Processors, 3.2 GHz The Mac Pro (Early 2008 Dual 3.2 GHz) computer uses a special coating on the processor heatsink and processor to manage the temperature in the computer. The silver-colored coating comes applied to the underside of the heatsink and the top of the processor.

  • Page 93

    (CPU B). Release the latch on the metal processor holder. Note: You may want to use a flat-blade screwdriver to release the latch. Mac Pro (Early 2008) Take Apart — Processors, 3.2 GHz...

  • Page 94

    Rotate the top of the holder to the open position. Placing a finger in the notch at the front of the processor holder, pry up the processor and lift it out of the holder. Mac Pro (Early 2008) Take Apart — Processors, 3.2 GHz...

  • Page 95

    Apple. bag until you are ready to install it. Be sure to follow all directions for unpacking the processor that are included in its packing box. Mac Pro (Early 2008) Take Apart — Processors, 3.2 GHz...

  • Page 96

    Then lower the processor straight down onto the socket. Note: Unlike in earlier Power Mac G5 computers, replacing a processor in Mac Pro (Early 2008) does not require running Apple Service Diagnostic for thermal calibration.

  • Page 97: Speaker Assembly

    Before you begin, open the computer, lay it on its side with the access side facing up, and remove the following: • Hard drives and hard drive carriers in drive bays 1 and • Any 12-inch PCI Express card • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Speaker Assembly...

  • Page 98

    Remove the three speaker assembly mounting screws. Carefully pivot the speaker assembly a short distance away from the enclosure. Disconnect the speaker assembly cable from the logic board. Remove the speaker assembly from the computer. Mac Pro (Early 2008) Take Apart — Speaker Assembly...

  • Page 99

    • Slide the speaker cable through the opening in the speaker bracket. • Using a magnetized jeweler’s #0 Phillips screwdriver, remove the four mounting screws. Remove the speaker and cable from the bracket. Mac Pro (Early 2008) Take Apart — Speaker Assembly...

  • Page 100: Usb Cable

    Before you begin, open the computer, lay it on its side with the access side facing up, and remove the following: • Hard drives and hard drive carriers in drive bays 1 and • Any 12-inch PCI Express card • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — USB Cable...

  • Page 101

    Procedure Disconnect the USB cable from connector J201 on the front panel board. Disconnect the USB cable from connector J2D1 on the logic board. Remove the cable from the enclosure. Mac Pro (Early 2008) Take Apart — USB Cable...

  • Page 102: Logic Board

    3.2 GHz Processors the unit while you are • Speaker assembl waiting for the part to • USB cabl arrive. • AirPort Extreme card (if installed • Bluetooth car Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 103

    Part Location Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 104

    To keep them out of the way, temporarily tape the antenna cables to the bottom of the media shelf or the enclosure. Important: Be sure to disconnect all cables from the logic board before you remove the logic board mounting screws. Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 105

    Starting at the back panel side of the logic board and working clockwise around the board, disconnect all cables from the logic board. Note: There are 14 cables you will be disconnecting from the logic board. Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 106

    Using a magnetized #1 Phillips screwdriver, remove the 11 black logic board mounting screws. Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 107

    Slide the logic board back a short distance from the port openings in the back panel. Make sure the ports clear the openings. Tilt the top edge of the logic board up and maneuver the board out of the enclosure. Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 108

    Transfer the processors to the new board: Refer to “ Processors, 2.8 and 3.0 GHz” and “Processors, 3.2 GHz” in the Take Apart chapter. • You must also transfer the back ports EMI shield to the new board. Mac Pro (Early 2008) Take Apart — Logic Board...

  • Page 109

    Replacement Note: To replace the logic board, tilt it as shown and lower it into the enclosure. Note: Unlike in earlier Power Mac G5 computers, replacing a logic board in Mac Pro (Early 2008) computer does not require running Apple Service Diagnostic for thermal calibration.

  • Page 110: Front Panel Board

    • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Front Panel Board...

  • Page 111

    Procedure Disconnect the optical drive ribbon cable from the logic board and move the cable out of the way. Mac Pro (Early 2008) Take Apart — Front Panel Board...

  • Page 112

    • USB cable from connector J201 • Front panel board power cable from connector J202 • Front panel board audio cable from connector J600 • Power button cable from connector J800 Mac Pro (Early 2008) Take Apart — Front Panel Board...

  • Page 113

    Note: If you are replacing the front panel board with a new front panel board, separate the EMI shield from the back of the board and transfer it to the new front panel board. Mac Pro (Early 2008) Take Apart — Front Panel Board...

  • Page 114: Power Button

    • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Power Button...

  • Page 115

    Disconnect the front panel board power cable from the front panel board and move it out of the way. Disconnect the power button cable from the front panel board. Lay the computer so that the front panel is facing down. Mac Pro (Early 2008) Take Apart — Power Button...

  • Page 116

    Remove the black rubber cap that covers the power button LED. Using a jeweler’s flat-blade screwdriver, pry up the metal C-ring that secures the power button board. Lift up and remove the power button board. Mac Pro (Early 2008) Take Apart — Power Button...

  • Page 117

    Remove the metal activation ring that lies below the power button board. Remove the power button from the enclosure. Mac Pro (Early 2008) Take Apart — Power Button...

  • Page 118: Airport Antenna Board With Cables

    • Speaker assembl while you are waiting • USB cabl for the part to arrive. • AirPort Extreme card (if installed • Bluetooth car • Logic boar Mac Pro (Early 2008) Take Apart — AirPort Antenna Board with Cables...

  • Page 119

    Remove the tape holding the antenna cables to the enclosure. Using a jeweler’s flat-blade screwdriver, pry open the three latches on the antenna cables ferrite bead and remove the bead from the cables. Mac Pro (Early 2008) Take Apart — AirPort Antenna Board with Cables...

  • Page 120

    Using the jeweler’s flat-blade screwdriver, carefully pry up the rectangular plastic plate on the bottom panel. Using a jeweler’s #0 Phillips screwdriver, remove the four antenna board mounting screws. Mac Pro (Early 2008) Take Apart — AirPort Antenna Board with Cables...

  • Page 121

    Tilt the antenna board away from the back panel a short distance. Feed each antenna cable separately out through the small opening in the bottom panel. Remove the antenna board and cables from the enclosure. Mac Pro (Early 2008) Take Apart — AirPort Antenna Board with Cables...

  • Page 122: Optical Drive Power Cable

    • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Optical Drive Power Cable...

  • Page 123

    Disconnect the optical drive power cable from the logic board. Insert the logic board end of the power cable into the opening in the media shelf at hard drive bay 1 and remove the cable from the enclosure. Mac Pro (Early 2008) Take Apart — Optical Drive Power Cable...

  • Page 124

    Mac Pro (Early 2008) Take Apart — Optical Drive Power Cable...

  • Page 125

    1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Optical Drive Data (Ribbon) Cable...

  • Page 126

    Disconnect the optical drive data cable from the logic board. Insert the cable into the opening in the media shelf at hard drive bay 1 and remove the cable from the enclosure. Mac Pro (Early 2008) Take Apart — Optical Drive Data (Ribbon) Cable...

  • Page 127: Ambient Board

    The only tools required for this procedure are a jeweler’s flat-blade screwdriver. Preliminary Steps Before you begin, open the computer, lay it on its side with the access side facing up, and remove optical drive carrier and optical drives. Part Location Mac Pro (Early 2008) Take Apart — Ambient Board...

  • Page 128

    Using a jeweler’s flat-blade screwdriver, carefully pry the board from the enclosure. Important: After you replace the ambient board, you must reset the System Management Controller. Refer to “Resetting the Logic Board” in the Troubleshooting chapter. Mac Pro (Early 2008) Take Apart — Ambient Board...

  • Page 129: Ambient Board Cable

    Optical drive carrier and optical drive • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Ambient Board Cable...

  • Page 130

    Route the ambient board cable out through the opening in the media shelf and remove the cable from the enclosure. Important: After you replace the ambient board cable, you must reset the System Management Controller. Refer to “Resetting the Logic Board” in the Troubleshooting chapter. Mac Pro (Early 2008) Take Apart — Ambient Board Cable...

  • Page 131

    • Speaker assembl waiting for the part to • USB cabl arrive. • AirPort Extreme card (if installed • Bluetooth car • Logic boar Mac Pro (Early 2008) Take Apart — Bluetooth Antenna Board and Cable...

  • Page 132

    Part Location Procedure Using needlenose pliers, gently grasp the Bluetooth antenna board and pull it out of its mounting. Mac Pro (Early 2008) Take Apart — Bluetooth Antenna Board and Cable...

  • Page 133

    Remove the tape holding the Bluetooth antenna cable to the enclosure. Remove the antenna board and antenna cable from the enclosure. Mac Pro (Early 2008) Take Apart — Bluetooth Antenna Board and Cable...

  • Page 134: Hard Drive Cable Harness

    • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Hard Drive Cable Harness...

  • Page 135

    Remove the connector from the bracket. Repeat for the other three connectors below hard drive bays 2, 3, and 4. Remove the hard drive cable harness from the enclosure. Mac Pro (Early 2008) Take Apart — Hard Drive Cable Harness...

  • Page 136: Hard Drive Temperature Sensor

    1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Part Location Mac Pro (Early 2008) Take Apart — Hard Drive Temperature Sensor Cable...

  • Page 137

    Replacement Note: The connectors on the hard drive temperature sensor cable are labeled with HDD1, HDD2, HDD3, and HDD4 to indicate the connector that belongs to each temperature sensor. Mac Pro (Early 2008) Take Apart — Hard Drive Temperature Sensor Cable...

  • Page 138

    • ard drives and hard drive carriers in drive bays 1 and 2 • Any 12-inch PCI Express cards • Processor heatsink cove • Front fan assembl Mac Pro (Early 2008) Take Apart — Hard Drive Temperature Sensor...

  • Page 139

    Part Location Procedure Disconnect the sensor cable for the hard drive in bay 1 and move the cable out of the way. Mac Pro (Early 2008) Take Apart — Hard Drive Temperature Sensor...

  • Page 140

    Using a mirror, locate the two round black nubs on the bottom of the hard drive sensor below hard drive bay 1. Using a black stick or a flat-blade screwdriver, press up on the nubs and remove the sensor from the enclosure. Mac Pro (Early 2008) Take Apart — Hard Drive Temperature Sensor...

  • Page 141: Power Cable Harness

    • Front fan assembl • Top and bottom memory card • Memory cage with rear fan • Optical drive power cabl • Optical drive data cabl • Front panel boar Mac Pro (Early 2008) Take Apart — Power Cable Harness...

  • Page 142

    Part Location Procedure Disconnect the power cable harness connectors from the logic board. Mac Pro (Early 2008) Take Apart — Power Cable Harness...

  • Page 143

    Replacement Note: Replace the cover at an angle so that the tabs engage with the slots in the media shelf. Then lower the cover into place. Mac Pro (Early 2008) Take Apart — Power Cable Harness...

  • Page 144

    Depress the locking latch on each cable connector and disconnect the four power supply cables from the four connectors on the power harness cable. Slip the four connectors out through the opening in the media shelf, removing them one at a time. Mac Pro (Early 2008) Take Apart — Power Cable Harness...

  • Page 145

    Remove the power harness cable from its routing along the edge of the logic board, over the speaker assembly, and along the bottom lip of the enclosure. Remove the power harness cable from the enclosure. Mac Pro (Early 2008) Take Apart — Power Cable Harness...

  • Page 146: Troubleshooting

     Service Source Troubleshooting Mac Pro (Early 2008) © 2008 Apple Inc. All rights reserved.

  • Page 147

    General Information Memory The Mac Pro (Early 2008) computer has two memory riser cards with a total of 8 memory slots. On each card, the slots are arranged as two banks of two slots each. The computer comes with a minimum of 2 GB of memory, installed as a pair of 1 GB FB-DIMMs. Additional pairs of 1 GB, 2 GB, or 4 GB FB-DIMMs can be installed in the open DIMM slots, as illustrated below.

  • Page 148

    2008) is four times greater than in the typical parallel bus configuration used by DDR and DDR2 memory, where the bus is shared by all DIMMs. In addition, the Mac Pro (Early 2008) serial channels are dual simplex, which allows both reads and writes to occur simultaneously on the bus.

  • Page 149: Pci Express Cards, Internal Cabling Matrix

    Internal Cabling Matrix The table on the next page lists all Mac Pro (Early 2008) internal cables that connect to the logic board and are not part of a larger subassembly. Following the table is a map of the logic board connector locations, which are listed in column 3 of the table.

  • Page 150

    USB 2.0 power and data to front panel board from main logic Front Panel Board USB 922-8494 board Thermal sensor signals from Intake Ambient Temperature ODD bay ambient temp sensor Sensor 922-8523 to main logic board Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 151: Thermal Calibration

    Use the diagram below to find the location of the internal cable connectors on the logic board. Thermal Calibration Unlike in earlier Power Mac G5 computers, replacing a processor in a Mac Pro (Early 2008) computer does not require running Apple Service Diagnostic for thermal calibration.

  • Page 152: Resetting The Logic Board

    Plug the power cord back in, making sure the power button is not being pressed at the time. Press the power button to start up the computer. Note: Unlike the logic board in earlier Mac Pro models, the logic board in the Mac Pro (Early 2008) computer does not include an SMC reset switch.

  • Page 153: Power-on Self Test: Ram And Processor Verification

    System Reset Mac Pro (Early 2008) has a system reset switch on the logic board that may be used to restart the system while it is powered up. This switch can be used to determine if a computer that won’t consistently boot from a cold start has power supply issues.

  • Page 154: Diagnostic Leds

    Diagnostic LEDs Logic Board Diagnostic LEDs The Mac Pro (Early 2008) logic board includes a set of LEDs to help service providers troubleshoot the computer. The LEDs are located on the logic board between the two DIMM riser card connectors. LEDs 3, 4, 5, and 6 are normally off and will automatically illuminate if an error occurs.

  • Page 155

    Check AC cord is connected to a working AC wall outlet. • Reseat AC Plug. • Check connections of power supply cables to the logic board. • Check power supply cable connections at power supply. • Replace power supply. Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 156

    If both overtemp LEDs come on immediately when the computer is turned on, a faulty power supply could be one cause of this behavior. Replace power supply. • Try swapping CPU A and CPU B heatsink locations. If the CPU Error LED follows the CPU Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 157

    Check for any signs of an obvious electrical short, e.g. metal screws or PCI card slot cover loose inside computer touching the logic board. LED 9 EFI Good Normally on when DIAG_LED button is pressed. Takes approximately 5 seconds after power up. Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 158

    Check that the front fan is working. • Try re-seating the card in the PCI Slot. • Make sure the card’s auxiliary booster power cable is connected (if there is one). • Re-boot the computer. Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 159: Power Supply Verification, Mac Pro Firmware Updates

    Firmware on Intel Mac computers is designed to be updated if necessary through a software update. Mac Pro (Early 2008) Troubleshooting — General Information...

  • Page 160

    EFI and SMC firmware is stored on the Mac Pro (Early 2008) logic board. EFI firmware updates update the Boot ROM, and SMC updates update the System Management Controller firmware. The SMC manages fans and other environmental parameters that are independent of the Boot ROM.

  • Page 161: Processor Heatsink And Processor Visual Inspection Instructions

    Processor Heatsink and Processor Visual Inspection Instructions The Mac Pro (Early 2008 Dual 3.2 GHz) computer uses a special coating on the processor heatsink and processor to manage the temperature in the computer. Before installing a new or existing heatsink or processor, always make a visual inspection of the part. Specifically, check the application of the silver-colored coating on the underside of the heatsink and the top of the processor.

  • Page 162

    Important: If you observe a heatsink or processor with a “splash” of special coating, first try to remove the excess by using the method described below under “Removing Stray Particles of Coating.” If this approach does not remove the splash, return the part to Apple. Removing Stray Particles of Coating In rare cases, small particles or beads of the silver-colored coating may appear outside the normal coated area of a replacement heatsink or processor.

  • Page 163

    Replace the gasket if it shows obvious damage, such as cracks, folds, and broken-off surfaces, or if it is dislocated from the heatsink. The gasket is available through GSX as part of the Mac Pro Grease Kit, part number 076-1258.

  • Page 164: Symptom Charts, How To Use The Symptom Charts, Startup Failures

    For information on how to correctly install DIMMs, see the “Memory (DIMMs)” topic in the Take Apart chapter. Important: For troubleshooting purposes, Mac Pro (Early 2008) computers may be started up and diagnosed with a single processor installed in either the upper (CPU A) or lower (CPU B) position.

  • Page 165

    Reseat video card. (Make sure video card is fully inserted in connector and end of card is secured by the connector latch.) For video cards that require power cables, check that they are connected. Verify speaker cable is fully seated. Mac Pro (Early 2008) Troubleshooting — Symptom Charts...

  • Page 166

    LEDs. Troubleshoot further if any LEDs indicate any failure. Reseat the processors and check for bent pins Replace the processors Replace the logic board Replace the power supply Mac Pro (Early 2008) Troubleshooting — Symptom Charts...

  • Page 167

    If the computer continues to perform sluggishly when booted this way, continue following the steps below. Run Apple Service Diagnostic to verify hardware is functional. Address any diagnostic failures as necessary.

  • Page 168

    Reseat card and antenna cables connected to card Replace card Replace logic board Replace AirPort Extreme antenna board / cable assembly Mac Pro (Early 2008) Troubleshooting — Symptom Charts...

  • Page 169: Other Failures, Optical Drive

    If two drives are installed, test one optical drive at a time by disconnecting one of the drives to see if the other one works. Replace optical drive cable Replace optical drive Replace logic board Mac Pro (Early 2008) Troubleshooting — Symptom Charts...

  • Page 170

    Replace logic board Internal speaker The Mac Pro (Early 2008) should emit a startup chime through its internal speaker, regardless of whether headphones or external speakers are connected. If you hear a normal startup chime, but no other audio is produced from the internal speaker, and there is nothing connected to either audio-out port, suspect a damaged front panel headphone port or rear audio-out port.

  • Page 171

    If the computer continues to exhibit the issue, follow the steps below. Check Sound settings in System Preferences Reset PRAM Replace logic board Mac Pro (Early 2008) Troubleshooting — Symptom Charts...

  • Page 172

     Service Source Upgrades Mac Pro (Early 2008) © 2008 Apple Inc. All rights reserved.

  • Page 173

    The only tool required for this procedure is a magnetized jewelers Phillips #1 screwdriver. Preliminary Steps Before you begin, open the computer, and lay it on its side with the access side facing up. Part Location Mac Pro (Early 2008) Upgrades — AirPort Extreme Card...

  • Page 174

    Insert the AirPort Extreme card into its logic board connector at an angle, as illustrated. Then lower the screw end of the card down to the standoffs on the logic board. Mac Pro (Early 2008) Upgrades — AirPort Extreme Card...

  • Page 175

    Install the two AirPort Extreme card mounting screws. Mac Pro (Early 2008) Upgrades — AirPort Extreme Card...

  • Page 176

    PCI Express/Graphics Card The Mac Pro (Early 2008) logic board includes one double-wide PCI Express graphics slot and three PCI Express expansion slots, for a total of four slots. The computer comes with a graphics card installed in slot 1. You can install additional PCI Express graphics and expansion cards in the remaining three PCI Express expansion slots.

  • Page 177

    Before you can install either type of card, however, you must first loosen the two captive screws that secure the PCI bracket to the enclosure and remove the bracket. You must also remove the port cover for the PCI slot where you are installing the new card. Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card...

  • Page 178

    • Pull the card gently to see if it is properly connected. If it resists and stays in place and its gold connectors are barely visible, the card is connected. Replace the PCI bracket and tighten the two screws that secure it to the enclosure. Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card...

  • Page 179

    PCI slot 1 to the connector that is closest to the heatsink cover. Connect the booster cable for a card in PCI slot 2 to the connector closest to the media shelf. Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card...

  • Page 180

     Service Source Views Mac Pro (Early 2008) © 2008 Apple Inc. All rights reserved.

  • Page 181: Exploded Views, Exploded View 1

    661-4686 (3.2 GHz) Northbridge Heatsink Logic Board 076-1305 661-4449 (2.8/3.0 GHz) Front Panel Board 661-4676 (3.2 GHz) 922-8491 Battery 922-6476 Speaker Bluetooth Antenna Bd 922-8525 922-8586 Enclosure AirPort Antenna Bd 922-8493 076-1306 Mac Pro (Early 2008) Views — Exploded Views...

  • Page 182: Exploded View 2

    Power Supply PS#3 Cable Front Panel Board 922-8501 Audio Cable 922-8560 Front Panel Board Power Supply FireWire Cable Control PS#4 922-8561 922-8499 Front Panel Board USB Cable 922-8494 Ambient Board Cable 922-8523 Mac Pro (Early 2008) Views — Exploded Views...

  • Page 183: External Views, Front View

    External Views Front View Optical drive Status light Second optical drive Headphone jack (optional) USB 2.0 ports (2) Power button FireWire 800 port FireWire 400 port Mac Pro (Early 2008) Views — External Views...

  • Page 184

    Gigabit Ethernet ports (2) PCI Express expansion slots DVI display port 1 DVI display port 2 Optical digital audio out port Optical digital audio in port Audio line-in port Audio line-out port Mac Pro (Early 2008) Views — External Views...

  • Page 185: Screw Matrix

    Logic board, frt panel board, Speaker assembly Optical drive front fan 922-7705 922-7707 922-7704 AirPort antenna board Power supply Memory cage 922-7734 922-7756 922-8528 Speaker AirPort/Bluetooth card Front fan to speaker 922-8535 Memory cage Mac Pro (Early 2008) Views — Screw Chart...

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