Lenovo IdeaCentre B750 Hardware Maintenance Manual
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Lenovo IdeaCentre B750 Hardware Maintenance Manual

Machine types: 10144/f0aa
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IdeaCentre B750
Hardware Maintenance Manual
Machine Types: 10144/F0AA

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Summary of Contents for Lenovo IdeaCentre B750

  • Page 1 IdeaCentre B750 Hardware Maintenance Manual Machine Types: 10144/F0AA...
  • Page 3 IdeaCentre B750 Hardware Maintenance Manual Machine Types: 10144/F0AA...
  • Page 4 First Edition (September 2013)3rd © Copyright Lenovo 2013. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software are delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925...

  • Page 5: Table Of Contents

    Selecting a startup device ..Replacing the CPU ... . . Exiting the Lenovo BIOS Setup Utility program . . Replacing the motherboard..
  • Page 6 IdeaCentre B750Hardware Maintenance Manual...

  • Page 7: Chapter 1. About This Manual

    Chapter 1. About this manual This manual contains service and reference information for IdeaCentre B750 computers listed on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products. Before servicing a Lenovo product, be sure to read the Safety Information.
  • Page 8 IdeaCentre B750Hardware Maintenance Manual...

  • Page 9: Chapter 2. Safety Information

    Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures. © Copyright Lenovo 2013...
  • Page 10 Observe the following rules when working on electrical equipment. Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.

  • Page 11: Safety Inspection Guide

    – Send another person to get medical aid. Safety inspection guide The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these products. Each machine, as it was designed and built, had required safety items installed to protect users and service personnel from injury.

  • Page 12: Grounding Requirements

    • Avoid contact with other people while handling the part. • Wear a grounded wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap.
  • Page 13 To Connect To Disconnect 1. Turn everything OFF. 1. Turn everything OFF. 2. First, attach all cables to devices. 2. First, remove power cords from outlet. 3. Attach signal cables to connectors. 3. Remove signal cables from connectors. 4. Attach power cords to outlet. 4.
  • Page 14 ≥18 kg(37 lbs) ≥32 kg(70.5 lbs) ≥55 kg(121.2 lbs) CAUTION: Use safe practices when lifting. CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord.

  • Page 15: Chapter 3. General Information

    This chapter provides general information that applies to all machine types supported by this publication. Specifications This section lists the physical specifications for your computer. This section lists the physical specifications for your computer. Type IdeaCentre B750 This section lists the physical specifications. Environment Air temperature: Operating: 10°...
  • Page 16 IdeaCentre B750Hardware Maintenance Manual...

  • Page 17: Chapter 4. General Checkout

    • If the computer displays a POST error, go to “POST error codes”. • If the computer hangs and no error is displayed, continue at step 7. 7. If the test stops and you cannot continue, replace the last device tested. © Copyright Lenovo 2013...
  • Page 18 IdeaCentre B750Hardware Maintenance Manual...

  • Page 19: Chapter 5. Using The Setup Utility

    1. If your computer is already on when you start this procedure, shut down the operating system and turn off the computer. 2. Press and hold the F1 key then turn on the computer. When the Lenovo BIOS Setup Utility program is displayed, release the F1 key.
  • Page 20 5. Select Save changes and Exit from the menu. Power-On Password When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a valid password is typed from the keyboard. Setting, changing, or deleting a Power-On Password Note: A password can be any combination of letters and numbers up to 16 character (a-z, and 0-9).

  • Page 21: Enabling Or Disabling A Device

    To set a Power-On Password, do the following: 1. Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on page 13.) 2. From the Security menu, select Set Power-On Password and press the Enter key.

  • Page 22: Selecting A Startup Device

    Selecting or changing the startup device sequence To view or permanently change the configured startup device sequence, do the following: 1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13). 2. From the Lenovo BIOS Setup Utility program main menu, select the Startup option.

  • Page 23: Exiting The Lenovo Bios Setup Utility Program

    Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS Setup Utility program main menu. You might have to press the Esc key several times. Do one of the following: •...
  • Page 24 IdeaCentre B750Hardware Maintenance Manual...

  • Page 25: Chapter 6. Symptom-To-Fru Index

    Check that the following are properly installed: Reseat connectors • Power Cord • On/Off Switch connector • System Board Power Supply connectors • Microprocessor(s) connection Check the power cord. Power Cord Check the power-on switch. Power-on Switch © Copyright Lenovo 2013...

  • Page 26: Post Error Codes

    POST error codes Each time you turn the computer on, it performs a series of tests to check that the system is operating correctly and that certain options are set. This series of tests is called the Power-On Self-Test, or POST. POST does the following: •...

  • Page 27: Chapter 7. Locating Connectors, Controls And Components

    5. Hard disk drive indicator 12. Novo Vision switch 6. Bluetooth status indicator 13. PC mode/HDMI-in switch 7. Wi-Fi status indicator 14. Monitor ON/OFF Attention: The effective range of the Built-in IR Emitter is 10 feet (3m). © Copyright Lenovo 2013...
  • Page 28 Left and right view The following illustration shows the location of connectors, controls and components on the left and right side of the computer. 5. Memory card reader 1. USB 3.0 connecto 2. Headphone connector 6. Optical drive eject button 3.
  • Page 29 Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1. TV tuner connector (selected models only) 5. USB 3.0 connectors (2) 2. Ethernet connector 6. USB 2.0 connectors (2) 3. HDMI-in connector 7.
  • Page 30 Hardware components The following illustration shows the components that make up your computer. 1. Rear cover 11. B-CAS card reader 2. Computer stand 12. System fan 3. Middle cover 13. Heat-sink 4. EMI cover 14. Subwoofer 5. Motherboard 15. Speaker system 6.
  • Page 31 Identifying parts on the motherboard The motherboard (sometimes called the planar or system board) is the main circuit board in your computer. It provides basic computing functions and supports a variety of devices that are factory-installed or that you can install later. The following illustration shows the location of connectors and components on the front of the motherboard.
  • Page 32 IdeaCentre B750Hardware Maintenance Manual...

  • Page 33: Chapter 8. Replacing Hardware

    Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information” in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and Warranty Guide, go to the Support Web site at: http://consumersupport.lenovo.com. Note: Use only parts provided by Lenovo.

  • Page 34: Replacing The Keyboard And Mouse

    Replacing the keyboard and mouse Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the keyboard and mouse Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices.

  • Page 35: Removing The Computer Cover

    Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 36: Replacing A Memory Module

    Attention: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
  • Page 37 Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. Refer to “Left and right view” and “Rear view” for help with locating the various connectors. Step 4.

  • Page 38: Replacing The Optical Drive

    Step 8. Install the new hard disk drive as follows: Attach the shielding to the new hard disk drive, and secure it to the hard disk drive with the two screws. Line up the new hard disk drive with the bracket and secure it with the pins. Slide the hard disk drive and bracket back into position.

  • Page 39: Removing The Computer Stand

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: For this procedure, it helps to place the computer face-down on a soft flat surface. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the screen surface from scratches or other damage.

  • Page 40: Removing The Middle Cover

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 41: Replacing The Converter Board

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 42: Replacing The Camera

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 43: Replacing The Power Switch Board

    Step 8. Push the two pin to release the camera , then lift the camera out. Step 9. Disconnect the data cable from the camera. Step 10. Push the pins to release the camera out of housing , then lift the camera out. Step 11.

  • Page 44: Removing The Emi Cover

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 45: Replacing The Subwoofer

    Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. Refer to “Left and right view” and “Rear view” for help with locating the various connectors. Step 4.

  • Page 46: Replacing The Speaker System

    Step 9. Disconnect the subwoofer cable from the connector on motherboard. Step 10. Lift up the subwoofer to remove it. Step 11. To install the new subwoofer: Line up the new subwoofer with mounting screws on the chassis, the place the new subwoofer into position.
  • Page 47 Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. Refer to “Left and right view” and “Rear view” for help with locating the various connectors. Step 4.

  • Page 48: Removing The Power Supply

    Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 49: Replacing The Tv Tuner Card

    Step 10. Disconnect the two power cables from the motherboard. Step 11. Remove the three screws that secure the power supply to the chassis, and then lift up the power supply as shown. Step 12. To install the new power supply: Line up the new power supply, secure it to the chassis using the three screws.

  • Page 50: Replacing The Wi-Fi Card

    Step 9. Disconnect the antenna cable(s) from the TV-Tuner card. Step 10. Remove the screw that secures the TV-Tuner card to the motherboard. Step 11. Pull the TV-Tuner card upward to remove it from the card port on the motherboard. Step 12.

  • Page 51: Replacing The System Fan

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 52: Replacing The Heat-Sink

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.

  • Page 53: Replacing The Cpu

    Step 10. Remove the eight screws that secure the heat-sink to the motherboard, and then lift up the heat-sink to remove it. Step 11. To install the new heat-sink: Line up the new heat-sink with mounting holes on motherboard and secure it with the eight screws.
  • Page 54 Step 12. Lift the microprocessor straight up and out of the socket. Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handing the microprocessor, touch only the sides. Note: Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible.

  • Page 55: Replacing The Motherboard

    Important: To avoid damaging the microprocessor contacts, keep the microprocessor completely level while installing it into the socket. Step 15. Lower the microprocessor straight down into its socket on the motherboard. Step 16. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into position with the small handle.
  • Page 56 Step 16. Remove all the cables connected to the motherboard, including: LVDS cables Hard disk drive power and SATA cables. Optical disk drive power and SATA cables. Power supply cables Converter cable Speaker cable Subwoofer cable Camera cable Power board cable Front function board cable Front indicator board cable B-CAS card cable...

  • Page 57: Replacing The Led Panel Module

    Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
  • Page 58 Optical disk drive power and SATA connector and cables. IdeaCentre B750Hardware Maintenance Manual...
  • Page 59 Wi-Fi antenna cables. Chapter 8 Replacing hardware...
  • Page 60 LVDS cables. Converter cable. Power board cable Step 17. Remove the motherboard. Refer to “Replacing the motherboard”. Step 18. To install the new the LED panel module: Attach the motherboard to the chassis, and secure it with the screws. Attach the Wi-Fi antenna cables to the front bezel. Install the hard disk drive and optical disk drive data and power connectors to the chassis.

  • Page 61: Chapter 9. General Information

    • Wake Up on Alarm: You can specify a date and time at which the computer will be turned on automatically. This can be either a single event , a daily event or a weekly event. • Wake Up on LAN: This feature allows LAN adapter card to wake the System. © Copyright Lenovo 2013...

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