Dell D01U Owner's Manual

Ultra small form factor

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Dell OptiPlex 790 Ultra Small Form Factor

Owner's Manual

Regulatory Model D01U

Regulatory Type D01U001

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Page 1 Dell OptiPlex 790 Ultra Small Form Factor Owner's Manual Regulatory Model D01U Regulatory Type D01U001...
Page 2 Information in this publication is subject to change without notice. © 2011 Dell Inc. All rights reserved. Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden. Trademarks used in this text: Dell...
Page 3 Contents Notes, Cautions, and Warnings..............2 1 Working on Your Computer..............7 ................7 Before Working Inside Your Computer ......................8 Recommended Tools ....................9 Turning Off Your Computer ................9 After Working Inside Your Computer 2 Cover......................11 ......................11 Removing the Cover ......................12 Installing The Cover 3 Front Bezel....................13 ....................13 Removing the Front Bezel...
Page 4 ................22 Installing The Chassis Intrusion Switch 8 Speaker......................23 ..................23 Removing the Internal Speaker ..................24 Installing The Internal Speaker 9 Heat Sink And Processor................25 ....................25 Removing the Heat Sink ....................27 Installing The Heat Sink 10 Processor....................29 ....................29 Removing the Processor ....................30 Installing The Processor 11 Coin-Cell Battery..................31 ..................31...
Page 5 System Setup ........................53 Boot Menu ....................53 Boot Menu Enhancements ....................54 Timing Key Sequences ........................55 Navigation .....................55 System Setup Options 21 Troubleshooting..................65 ......................65 Diagnostic LEDs ........................72 Beep Codes .......................75 Error Messages 22 Specifications..................85 ....................85 Technical Specifications 23 Contacting Dell..................95 ........................95 Contacting Dell...
Page 7 Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Page 8 CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable.
Page 9 Connect any telephone or network cables to your computer. Connect your computer and all attached devices to their electrical outlets. Turn on your computer. Verify that the computer works correctly by running the Dell Diagnostics.
Page 11 Cover Removing the Cover Before Working Inside Your Computer . Follow the procedures in Loosen the thumb screw that secures the computer cover. Slide the cover towards the back of the computer. Lift the cover up and away from the computer.
Page 12 Installing The Cover Place the computer cover on the chassis. Slide the computer cover towards the front of the chassis, until it clicks into place. Tighten the thumb screw to secure the computer cover. After Working Inside Your Computer . Follow the procedures in...
Page 13 Front Bezel Removing the Front Bezel Before Working Inside Your Computer . Follow the procedures in cover . Remove the Pry the front bezel retention clips away from the chassis. Rotate the bezel away from the computer, to release the hooks on the opposite edge of the bezel from the chassis.
Page 14 Installing The Front Bezel Insert the hooks along the bottom edge of the front bezel into the slots on the chassis front. Rotate the bezel toward the computer to engage the front bezel retention clips, until they click into place. cover .
Page 15 Optical Drive Removing the Optical Drive Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Release the retention clip and remove the optical drive from its cage. Remove the optical drive bracket.
Page 16 Installing The Optical Drive Fix the optical drive bracket to the optical drive. Secure the optical drive into its cage. drive cage . Install the front bezel . Install the cover . Install the After Working Inside Your Computer . Follow the procedures in...
Page 17 Hard Drive Removing the Hard Drive Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Remove the hard-drive cage from the compartment. Remove the screws that secure the hard drive to the drive cage. Slide the hard drive to release it from the drive cage.
Page 18 Installing the Hard Drive Slide the hard drive back into the drive cage. Tighten the screws to secure the hard drive to the drive cage. drive cage . Install the front bezel . Install the cover . Install the After Working Inside Your Computer . Follow the procedures in...
Page 19 Memory Removing the Memory Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Press out on the release tabs located on each side of the memory module. Lift the memory module out of the connector on the system board and remove it.
Page 20 Installing The Memory Insert the memory module into the connector on the system board. Press down on the memory module until the release tabs spring back to secure it in place. drive cage . Install the front bezel . Install the cover Install the After Working Inside Your Computer .
Page 21 Chassis Intrusion Switch Removing the Chassis Intrusion Switch Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the intrusion cable from system board. Slide the intrusion switch over and remove it off the bracket.
Page 22 Installing The Chassis Intrusion Switch Insert the intrusion switch into the bracket on the power supply and slide it over to secure it. Connect the intrusion cable to the system board. drive cage . Install the front bezel . Install the cover .
Page 23 Speaker Removing the Internal Speaker Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the speaker cable from the system board. Pull out the speaker cable from beneath the system fan cable and wireless local Area network (WLAN) antennae (if installed).
Page 24 Release the latch and rotate the speaker. Remove the speaker from the chassis. Installing The Internal Speaker Place the speaker on the appropriate location of the chassis rear and rotate until the latch is secured in place. Route the speaker cable beneath the system fan cable and wireless local area network (WLAN) antennae (if installed).
Page 25 Heat Sink And Processor Removing the Heat Sink Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the heat sink/fan assembly cable from the system board. Press the release lever down and move it outward to release the fan retention hook that secures it.
Page 26 Raise the heat sink/fan assembly. Loosen the captive screws to secure the heat sink/fan assembly to the system board. Lift the heat sink/fan assembly upward, and remove it from the computer. Lay the assembly with the fan facing downward, and with the thermal grease facing upward.
Page 27 Installing The Heat Sink Place the heat sink/fan assembly into the chassis. Tighten the captive screws to secure the heat sink/fan assembly to the system board. Lower the heat sink/fan assembly. Press the release lever down and then move it inward to secure it with the fan retention hook.
Page 29 Processor Removing the Processor Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the heat sink . Remove the Press the release lever down. Then move it outward to release it from the retention hook that secures it.
Page 30 Lift the processor to remove it from the socket and place it into an antistatic packaging. Installing The Processor Insert the processor into the processor socket. Ensure the processor is properly seated. Lower the processor cover. Press the release lever down and then move it inward to secure it with the retention hook.
Page 31 Coin-Cell Battery Removing the Coin-Cell Battery Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the heat sink . Remove the Press the release latch away from the battery to allow the battery to pop up from the socket.
Page 32 Installing The Coin-Cell Battery Place the coin-cell battery into the slot on the system board. Press the coin-cell battery downward until the release latch springs back into place to secure it. heat sink . Install the drive cage . Install the front bezel .
Page 33 System Fan Removing the System Fan Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the system-fan cable from the system board. Disengage the system-fan cable from the chassis. Remove the screws that secure the fan to the chassis.
Page 34 Lift and remove the system fan out of the chassis. Installing The System Fan Place the system fan in the chassis. Tighten the screws to secure the system fan to the chassis. Thread the system-fan cable into the chassis clip. Connect the system-fan cable to the system board.
Page 35 Input/Output Panel Removing the Input/Output Board Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the Input/Output board cable from the system board. Remove the screws that secure the Input/Output bracket. Remove the Input/Output bracket from the chassis.
Page 36 Remove the screws that secure the Input/Output board. Remove the Input/Output bracket. Installing the Input/Output Board Align the Input/Output board with the Input/Output bracket and tighten the screws securing the Input/Output board. Insert the Input/Output bracket into the slot on the chassis front. Tighten the screws to secure the Input/Output bracket.
Page 37 Power Supply Removing the Power Supply Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the intrusion switch . Remove the heat sink . Remove the Disconnect the cables from the system board.
Page 38 Remove the screws that secure the power supply to the chassis. 10. Slide the power supply inward and remove the power supply. Installing The Power Supply Place the power supply in the chassis and slide it outward to secure it. Tighten screws to secure the power supply to the chassis.
Page 39 intrusion switch . Install the drive cage . Install the front bezel . Install the cover . Install the After Working Inside Your Computer . Follow the procedures in...
Page 41 System Board Removing the System Board Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the power supply . Remove the heat sink . Remove the memory .
Page 42 13. Remove the screws that secure the system board to the chassis. 14. Remove the 7–mm hex screw from the system board. 15. Slide the system board towards the front of the computer.
Page 43 16. Remove the system board from the chassis. Installing The System Board Align the system board to the port connectors on the rear of the chassis, and place the system board in the chassis. Tighten the 7–mm hex screw to secure the system board to the chassis. Tighten the screws to secure the system board to the chassis.
Page 44 drive cage . 12. Install the front bezel . 13. Install the cover . 14. Install the After Working Inside Your Computer . 15. Follow the procedures in...
Page 45 Drive Cage Removing the Drive Cage Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the Lift the drive cage using the handle and flip over the drive cage. Remove the data cable and power cable from the back of the optical drive. Remove the data cable and power cable from the back of the hard drive.
Page 46 Remove the drive cage from the system. Installing The Drive Cage Place the drive cage on the edge of the computer to allow access to the cable connectors on the hard drive and optical drive. Connect the data cable and power cable to the back of the hard drive. Connect the data cable and power cable to the back of the optical drive.
Page 47 Wireless Module Removing the Wireless Module Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel Remove the drive cage . Remove the Disconnect the cables from the wireless local area network (WLAN) card. Push the securing levers away from the WLAN card.
Page 48 Installing The Wireless Module Slide the wireless local access network (WLAN) card into its slot. Press the WLAN card downward until it is locked in place by the securing levers. Connect the antennae according to the color code on the WLAN card. drive cage .
Page 49 Control Panel Removing the Control Panel Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the memory . Remove the Disconnect the control panel cable from the system board. Unthread the control panel-speaker cable from the chassis clip.
Page 50 Remove the screw that secures the control panel board. Remove the control panel board. Installing The Control Panel Insert the control panel board into the slot on the chassis front. Tighten the screw to secure the control panel board. Thread the control panel-speaker cable into the chassis clip. Connect the control panel cable to the system board.
Page 51 Internal Antenna Removing the Internal Antenna Before Working Inside Your Computer . Follow the procedures in cover . Remove the front bezel . Remove the drive cage . Remove the Disconnect the cables from the wireless local area network (WLAN) card. Unthread the internal antenna.
Page 52 Remove the internal antenna. Installing The Internal Antenna Insert the internal antenna into the port in the chassis and slide toward the right to secure it. Thread the internal antenna into the chassis clip. Connect the cables to the wireless local area network (WLAN) card. drive cage .
Page 53 System Setup System Setup This computer offers you the following options: • Access System Setup by pressing <F2> • Bring up a one-time boot menu by pressing <F12> Press <F2> to enter System Setup and make changes to the user-definable settings.
Page 54 Partition. The benefit here is that you do not have to remember the <Ctrl><Alt><D> and <Ctrl><Alt><F10> keystrokes (although they still work). NOTE: The BIOS features an option to disable either or both of the keystroke prompts under the System Security / Post Hotkeys submenu. When you enter the <F12>...
Page 55 Navigation The computer setup can be navigated by either the keyboard or the mouse. Use the following keystrokes to navigate the BIOS screens: Action Keystroke Expand and collapse field <Enter>, left- or right-arrow key, or +/– Expand or collapse all fields <...
Page 56 General Boot Sequence Allows you to specify the order in which the computer attempts to find an operating system. The options are: • Diskette drive • USB Storage Device • CD/DVD/CD-RW Drive • Onboard NIC • SATA • CD/DVD/CD-RW Drive Boot List Option •...
Page 57 System Configuration NOTE: The operating system may allocate resources even though the setting is disabled. SATA Operation Allows you to configure the operating mode of the integrated hard drive controller. • AHCI = SATA is configured for AHCI mode • ATA = SATA is configured for ATA mode •...
Page 58 Video Multi-Display Allows you to enable or disable Multi-Display. It should be enabled for Windows 7 32/64-bit only. . Enable Multi-Display — This option is disabled by default. NOTE: The Video setting will only be visible when a video card is installed in the system.
Page 59 Security Password Change Allows you to determine whether changes to the System and Hard Disk passwords are permitted when an administrator password is set. Allow Non-Admin Password Changes — This option is enabled by default. Non-Admin Setup This option lets you determine whether changes to the setup Changes option are permitted when an administrator password is set.
Page 60 Security these settings are capable of preventing access to Intel RAID (CTRL+I) or Intel Management Engine BIOS Extension (CTRL +P/F12) • Enable — User may enter OROM configuration screens via the hotkey. • One-Time Enable — User may enter OROM configuration screens via the hotkeys on next boot only.
Page 61 Power Management AC Recovery Determines how the system responds when AC power is re- applied after a power loss. You can set the AC Recovery to: • Power Off (default) • Power On • Last State Auto On Time Allows you to set the option to automatically turn on the computer.
Page 62 POST Behavior Numlock LED Allows you to enable or disable the Numlock feature when your computer starts. This option is enabled by default. Keyboard Errors Allows you to enable or disable the keyboard error reporting when the computer starts. This option is enabled by default. POST Hotkeys Allows you to specify the function keys to display on the screen when the computer starts.
Page 63 Maintenance SERR Messages Controls the SERR message mechanism. This option is not set by default. Some graphics cards require that the SERR message mechanism be disabled. Image Server Lookup Method Specifies how the ImageServer looks up the server address. • Static IP •...
Page 64 Image Server NOTE: This field is only relevant when the "Integrated NIC" control in the "System Configuration" group is set to "Enabled with ImageServer" and when "Client DHCP" is set to "Static IP". Client Subnet Mask Specifies the subnet mask of the client. The default setting is 255.255.255.255.
Page 65 Troubleshooting Diagnostic LEDs NOTE: The diagnostic LEDs only serve as an indicator of the progress through the Power-on Self-Test (POST) process. These LEDs do not indicate the problem that caused the POST routine to stop. The diagnostic LEDs are located on the front of the chassis next to the power button.
Page 66 • Ensure that any power strips being used are plugged into an electrical outlet and are turned on. • Ensure that the electrical outlet is working by testing it with another device, such as a lamp. • Ensure that the main power cable and front panel cable are securely connected to the system board.
Page 67 • If the LED still does not illuminate, the problem is with the power supply. Power Button Problem Memory modules are detected, but a memory power failure has Description occurred. Troubleshooting • If two or more memory modules are installed, remove Steps the modules, then re-install one module and re-start the computer.
Page 68 Problem Description A possible system board failure has occurred. Troubleshooting Steps Remove all peripheral cards from the PCI and PCI-E slots and re-start the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one. Power Button Problem Description Power connector not installed properly.
Page 69 • If the problem persists, the system board is faulty. Power Button Problem Description A possible coin cell battery failure has occurred. Troubleshooting Steps Remove the coin cell battery for one minute, reinstall the battery, and restart. Power Button Problem Description A possible processor failure has occurred.
Page 70 • If available, install working memory of the same type into your computer. Power Button Problem Description A possible hard drive failure has occurred. Troubleshooting Steps Re-seat all power and data cables. Power Button Problem Description A possible USB failure has occurred. Troubleshooting Steps Re-install all USB devices and check all cable connections.
Page 71 Power Button Problem Description Memory modules are detected, but a memory configuration or compatibility error has occurred. Troubleshooting Steps • Ensure that no special requirements for memory module/connector placement exist. • Ensure that the memory you are using is supported by your computer.
Page 72 Problem Description A possible system board resource and/or hardware failure has occurred. Troubleshooting • Clear CMOS. Steps • Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.
Page 73 Code 1-1-2 Cause Microprocessor register failure Code 1-1-3 Cause NVRAM Code 1-1-4 Cause ROM BIOS checksum failure Code 1-2-1 Cause Programmable interval timer Code 1-2-2 Cause DMA initialization failure Code 1-2-3 Cause DMA page register read/write failure Code 1-3-1 through 2-4-4 Cause DIMMs not being properly identified or used Code...
Page 74 Code 3-2-4 Cause Keyboard Controller Test failure Code 3-3-1 Cause NVRAM power loss Code 3-3-2 Cause NVRAM configuration Code 3-3-4 Cause Video Memory Test failure Code 3-4-1 Cause Screen initialization failure Code 3-4-2 Cause Screen retrace failure Code 3-4-3 Cause Search for video ROM failure Code 4–2–1...
Page 75 [nnnn]. For help in resolving this problem, please note this checkpoint and contact Dell Technical Support. Description The computer failed to complete the boot routine three consecutive times for the same error. Contact Dell and report the checkpoint code (nnnn) to the support technician...
Page 76 Alert! Security override Jumper is installed. Description The MFG_MODE jumper has been set and AMT Management features are disabled until it is removed. Attachment failed to respond Description The floppy or hard drive controller cannot send data to the associated drive.
Page 77 Decreasing available memory Description One or more memory modules may be faulty or improperly seated. Re- install the memory modules and, if necessary, replace them. Diskette drive 0 seek failure Description A cable may be loose or the computer configuration information may not match the hardware configuration.
Page 78 Hard-disk drive controller failure Description The hard drive failed initialization. Hard-disk drive failure Description The hard drive failed initialization. Hard-disk drive read failure Description The hard drive failed initialization. Invalid configuration information-please run SETUP program Description The computer configuration information does not match the hardware configuration.
Page 79 Memory allocation error Description The software you are attempting to run is conflicting with the operating system, another program, or a utility. Memory data line failure at address, read value expecting value Description A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary, replace them.
Page 80 Memory tests terminated by keystroke Description A keystroke interrupted the memory test. No boot device available Description The computer cannot find the floppy disk or hard drive. No boot sector on hard-disk drive Description The computer configuration information in System Setup may be incorrect.
Page 81 Read fault Description The operating system cannot read from the floppy or hard drive, the computer could not find a particular sector on the disk, or the requested sector is defective. Requested sector not found Description The operating system cannot read from the floppy or hard drive, the computer could not find a particular sector on the disk, or the requested sector is defective.
Page 82 Description The keyboard controller may be malfunctioning or a memory module may be loose. WARNING: Dell's Disk Monitoring System has detected that drive [0/1] on the [primary/secondary] EIDE controller is operating outside of normal specifications. It is advisable to immediately back up your data and replace your hard drive by calling your support desk or Dell.
Page 83 Write fault on selected drive Description The operating system cannot write to the floppy or hard drive. X:\ is not accessible. The device is not ready Description The floppy drive cannot read the disk. Insert a floppy disk into the drive and try again.
Page 85 Specifications Technical Specifications NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start (or Start in Windows XP) Help and Support, and then select the option to view information about your computer. Processor Processor type •...
Page 86 Memory Desktop, Mini-Tower, Small Form four DIMM slots Factor Ultra Small Form Factor two DIMM slots Capacity 1 GB, 2 GB, and 4 GB Minimum Memory 1 GB Maximum memory Desktop, Mini-Tower, Small Form 16 GB Factor Ultra Small Form Factor 8 GB Video Integrated...
Page 87 Expansion Bus • x1-slot bidirectional speed – 500 MB/s • x16-slot bidirectional speed – 16 GB/s SATA: 1.5 Gbps, 3.0 Gbps, and 6.0 Gbps Cards Mini-Tower up to one full-height card Desktop up to one low-profile card Small Form Factor none Ultra Small Form Factor none...
Page 88 Drives Ultra Small Form Factor one slim line bay Internally Accessible: 3.5–inch SATA drive bays Mini-Tower Desktop Small Form Factor Ultra Small Form Factor none 2.5–inch SATA drive bays Mini-Tower Desktop Small Form Factor Ultra Small Form Factor External Connectors Audio: Back Panel two connectors for line-out and line-in/...
Page 89 External Connectors Back Panel: 5 Video 15-pin VGA connector, 20-pin DisplayPort connector NOTE: Available video connectors may vary based on the graphics card selected. System Board Connectors PCI 2.3 data width (maximum) — 32 bits Mini-Tower, Desktop one 120-pin connector Small Form Factor, Ultra Small Form none Factor...
Page 90 System Board Connectors Mini-Tower, Desktop, Small Form four 240-pin connectors Factor Ultra Small Form Factor two 240-pin connectors Internal USB Mini-Tower, Desktop one 10-pin connector Small Form Factor, Ultra Small Form none Factor System Fan one 5-pin connector Front panel control Mini-Tower, Desktop, Small Form one 34-pin connector Factor...
Page 91 Controls and Lights Blinking amber light indicates a problem with the system board. Drive activity light Blue light — Blinking blue light indicates that the computer is reading data from or writing data to the hard drive. Diagnostic lights Four lights located on the front panel of the computer.
Page 92 Power Wattage Maximum Voltage Heat Dissipation Mini-Tower 265 W 1390 BTU/hr 100 VAC to 240 VAC, 50 Hz to 60 Hz, 5.0 A Desktop 250 W 1312 BTU/hr 100 VAC to 240 VAC, 50 Hz to 60 Hz, 4.4 A Small Form 240 W 1259 BTU/hr...
Page 93 Environmental Maximum vibration: Operating 0.25 GRMS Storage 0.5 GRMS Maximum shock: Operating 40 G Storage 105 G Altitude: Operating –15.2 m to 3048 m (–50 ft to 10,000 ft) Storage –15.2 m to 10,668 m (–50 ft to 35,000 ft) Airborne contaminant level G1 or lower as defined by ANSI/ISA- S71.04-1985...
Page 95 Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: Visit support.dell.com. Select your support category.

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Optiplex 790