Lenovo ThinkCentre Edge 72z Hardware Maintenance Manual page 106

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 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 94.
4. Locate the rear I/O assembly. See "Locating major FRUs and CRUs" on page 82.
5. Remove the two screws
Figure 22. Removing the two screws that secure the rear I/O assembly
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ThinkCentre Edge Hardware Maintenance Manual
1 that secure the rear I/O assembly.