Replacing The System Board - Lenovo ThinkCentre M79 Hardware Maintenance Manual
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Also See for ThinkCentre M79:
- Hardware maintenance manual (186 pages) ,
- User manual (154 pages) ,
- Safety, warranty, and setup manual (2 pages)
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Replacing the system board
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Read this first: Important safety information" on page 1.
Note: Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the
system board. After you replace the system board, the VPD must be updated. To update the VPD, see
"Updating or recovering the BIOS" on page 66.
This section provides instructions on how to replace the system board.
CAUTION:
The heat sink and microprocessor might be very hot. Turn off the computer and wait three to five
minutes to let the computer cool before removing the computer cover.
To replace the system board, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 101.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 102.
4. Pivot the drive bay assembly upward. See "Accessing the system board components and drives" on
page 104.
5. Remove all memory modules and PCI Express cards that are currently installed. See "Installing or
replacing a memory module" on page 105 and "Installing or replacing a PCI card" on page 107.
6. Remove the heat sink and fan assembly from the failing system board. See "Replacing the heat sink and
fan assembly" on page 122.
Note: Do not let the thermal grease on the bottom of the heat sink and fan assembly get in contact
with anything.
7. Record the cable routing and cable connections and then disconnect all cables from the system board.
8. Remove the eight screws that secure the system board.
.
Chapter 11
Installing or replacing hardware
131
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Troubleshooting
