Replacing The Microprocessor Fan - Lenovo ThinkCentre Hardware Maintenance Manual

Replacing the microprocessor fan

Attention
Do not open your computer or attempt any repair before reading and understanding the "Important safety
information" in the ThinkCentre Edge Safety and Warranty Guide that came with your computer. To obtain a
copy of the ThinkCentre Edge Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the microprocessor fan.
To replace the microprocessor fan, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface. Hold the sides of your computer and
gently lay it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See "Removing the computer cover" on page 91.
4. Locate the microprocessor fan in the computer. See "FRU locations" on page 82.
5. Remove the microprocessor board shield. See "Removing and reinstalling the system board shield"
on page 98.
6. Note the routing of the microprocessor fan cable, and then disconnect the microprocessor fan cable
from the system board. See "System board parts and connectors" on page 84.
7. Remove the two screws
microprocessor fan off the main bracket.
Figure 27. Removing the microprocessor fan
8. To reinstall the microprocessor fan, position the new microprocessor fan on the main bracket and align
the screw holes in the new microprocessor fan with those in the main bracket. Reinstall the two screws
that secure the microprocessor fan to the main bracket.
102
ThinkCentre Hardware Maintenance Manual
1 that secure the microprocessor fan to the main bracket. Then, lift the