Replacing The System Board - Lenovo ThinkCentre 3026 Maintenance Instructions Manual

10. Remove the protective cover 2 that protects the gold contacts on the new
11. Hold the new microprocessor and align the notches on it with the tabs in the
12. Lower the new microprocessor straight down into the microprocessor socket
13. Close the microprocessor retainer and lock it into position with the small
14. Reinstall the heat sink and fan assembly. See "Replacing the heat sink" on
15. Reinstall the hard disk drive. See "Replacing the hard disk drive" on page
16. Reconnect the heat sink and fan assembly cable to the microprocessor fan
17. Go to "Completing the parts replacement" on page 148.

Replacing the system board

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
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 opening the computer
cover.
To replace the system board:
1. Open the computer cover. See "Opening the computer cover" on page 120.
Chapter 9. Replacing FRUs (Machine types: 3026, 3039, 3137, 3149, 3245, 3269, 3319, 3394, 3491, 3627, 3699, 3878, 4972, 5132, 5261,
microprocessor 1 .
microprocessor socket, or align the small triangle on one corner with the
corresponding beveled corner of the microprocessor socket.
on the system board.
handle to secure the new microprocessor in the socket.
page 131.
139.
connector on the system board.
5297, 5391, 5472, 5485, 5536, 5548, 5567, 5864, and 6213.)
135