Lenovo ThinkCentre M83z Maintenance Manual page 94

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
To replace the rear I/O assembly, 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 86.
6. Remove the five screws
board. Then, lift the rear I/O assembly as shown.
Figure 22. Removing the five screws that secure the rear I/O assembly
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ThinkCentre M83z Hardware Maintenance Manual
1 , and then gently twist the rear I/O assembly to free it from the system