Replacing The Microprocessor Fan - Lenovo ThinkCentre M73z Hardware Maintenance Manual

12. Install the VESA mount bracket. See "Removing and installing the VESA mount bracket" on page 93.
13. Install the rear I/O assembly. See "Replacing the rear I/O assembly" on page 89.
14. Install the system board shield. See "Removing and installing the system board shield" on page 88.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 118.

Replacing the microprocessor fan

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
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 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 stand. See "Removing and installing the computer stand" on page 73.
4. Remove the computer cover. See "Removing the computer cover" on page 76.
5. Remove the system board shield. See "Removing and installing the system board shield" on page 88.
6. Remove the rear I/O assembly. See "Replacing the rear I/O assembly" on page 89.
7. Remove the VESA mount bracket. See "Removing and installing the VESA mount bracket" on page 93.
8. Note the routing of the microprocessor-fan cable, and then disconnect the cable from the system board.
9. Remove the two screws
Figure 33. Removing the microprocessor fan
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ThinkCentre M73z Hardware Maintenance Manual
1 , and then lift the microprocessor fan to remove it from the chassis.