e. Lower the microprocessor retainer and then lower the lever to secure the retainer. Make sure the
lever is securely locked into position.
f. Follow any additional instructions included with the replacement part you received.
10. Install the new retention module to the new system board.
11. Remove the memory modules from the failing system board and install them in the same location on
the new system board.
12. Install the new system board into the chassis and align the screw holes with those in the chassis. Insert
and tighten the screws that secure the system board.
13. Install the new Microprocessor in the new system board. See “Replacing the microprocessor” on
page 75.
14. Install the heat sink and fan assembly on the system board. See “Replacing the heat sink and fan
assembly” on page 74.
15. Connect the heat sink and fan assembly cable to the new system board. See the system board
illustration for your machine type at “System board connectors” on page 68.
16. Pivot the hard disk drive back into position.
17. Connect the power and signal cables to the hard disk drive.
18. Connect all cables to the system board. See the system board illustration for your machine type at
“System board connectors” on page 68.
19. Go to “Completing the FRU replacement” on page 95.
Replacing the heat sink and fan assembly
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 opening the computer cover.
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety
information” in the
ThinkCentre Safety and Warranty Guide
that was included with your computer. To obtain
a copy of the
ThinkCentre Safety and Warranty Guide
, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the heat sink and fan assembly.
To replace the heat sink and fan assembly:
74
ThinkCentre Hardware Maintenance Manual
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