Lenovo ThinkStation S20, Hardware Manual

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7. Lower the microprocessor straight down into the microprocessor socket of the
system board.
8.
Close the microprocessor retainer and clamp it with the small handle.
9. Place the heat sink into position and replace the 4 screws to secure the heat
sink to the system board.
10. Reconnect the heat sink fan cable.
11. Go to “Completing the FRU replacement” on page 131.
Replacing 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.
Attention
Do not open your computer or attempt any repair before reading and understanding the
“Important safety information” in the
ThinkStation Safety and Warranty Guide that came
with your computer. To obtain a copy of the ThinkStation Safety and Warranty Guide , go to:
http://www.lenovo.com/support
Note: When replacing the system board a new retention module for the
microprocessor heat sink is required. Make sure you have a new retention
module before beginning this procedure.
This section provides instructions on how to remove and install the system board.
To replace the system board:
1. Open the cover. See “Removing the cover” on page 96.
2. Lay the computer on its side for easier access to the system board.
3.
Remove any adapter cards installed in the PCI connectors. See “Replacing a
PCI adapter card” on page 104.
4. Remove the hard disk drive fan. See “Replacing the hard disk drive fan
assembly” on page 121.
5. Remove the memory modules from the failing system board.
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Hardware Maintenance Manual