Replacing The Heat Sink - Lenovo ThinkStation C20x 4269 Hardware Manual

Replacing the heat sink

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.
This section provides instructions on how to replace the heat sink.
To replace the heat sink:
1. Open the computer cover. See "Opening the cover" on page 130.
2. Lay the computer on its side for easier access to the heat sink.
3. Remove the heat sink and fan assembly cable from the system board. Note the
cable location.
Follow this sequence to remove the heat sink from the system board:
a. Partially remove screw 1 , then fully remove screw 3 , and fully remove
screw 1 .
b. Partially remove screw 2 , then fully remove screw 4 , and fully remove
screw 2 .
Note: If you are removing the heat sink as part of a procedure to remove
some other part, you can reuse the heat sink without replacing the
grease as long as the grease on the heat sink or the microprocessor has
not been disturbed or contaminated. Be careful not to touch the heat
Chapter 10. Replacing FRUs (types 6427 and 6493)
141