Lenovo ThinkCentre E73z Hardware Maintenance Manual page 96

This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and fan assembly might be very hot. Turn off the computer and wait three to five
minutes to let the computer cool before removing the computer cover.
To replace the microprocessor, 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 75.
4. Locate the microprocessor on the system board. See "Locating major FRUs and CRUs" on page 66.
5. Remove the system board shield. See "Removing and reinstalling the system board shield" on page 83.
6. Remove the heat sink assembly to gain access to the microprocessor. See "Replacing the heat sink
assembly" on page 90.
7. Press the small handle
Figure 28. Opening the retainer to access the microprocessor
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ThinkCentre E73z Hardware Maintenance Manual
1 to open the retainer 2 to access the microprocessor 3 .