Replacing The Microprocessor - Lenovo ThinkCentre A61 Hardware Maintenance Manual

19. Install the retention module for the heat sink and fan assembly on the system
20. Install the heat sink and fan assembly on the new system board.
21. Reconnect the heat sink and fan assembly cable to the system board. See
22. Install the new system board into the chassis and align the screw holes with
23. Reinstall the hard disk drive. See "Replacing the hard disk drive" on page
24. Align the drive bay assembly with the two slots and rails on the sides of the
25. Reconnect the remaining cables to the system board.
26. Reinstall the front bezel.
27. Reinstall any PCI adapter cards that were removed.
28. Position the fan duct on the heat sink fan.
29. Go to "Completing the FRU replacement" on page 140.

Replacing the microprocessor

This section provides instructions on how to replace the microprocessor.
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 microprocessor:
board.
"Locating parts on the system board" on page 119.
those in the chassis. Insert and tighten the screws that secure the system
board.
132.
chassis, reconnect the drive cables to the system board, and then slide the
drive bay assembly towards the rear of the chassis until it snaps into position.
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 came with
your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:
http://www.lenovo.com/support
1. Remove the cover. See "Removing the computer cover" on page 117.
2. Lift the fan duct off the heat sink fan.
3. Disconnect the heat sink and fan assembly cable from the system board. See
"Locating parts on the system board" on page 119.
Chapter 9. Replacing FRUs - Desktop computers
129