Lenovo ThinkCentre M90z (English) User Guide - Page 51

Replacing the rear I/O assembly

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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 50. Replacing the rear I/O assembly Attention: Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support This section provides instructions on how to replace the rear I/O assembly. 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 cover. See "Removing the computer cover" on page 14. 4. Remove the rear I/O assembly cover. See "Removing or reinstalling the rear I/O assembly cover" on page 17. 5. Locate the rear I/O assembly. See "Component locations" on page 10. Chapter 2. Installing or replacing hardware 43

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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 50.
Replacing the rear I/O assembly
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the
ThinkCentre Safety and Warranty Guide
that came with your computer. To obtain a copy of the
ThinkCentre
Safety and Warranty Guide
, go to:
This section provides instructions on how to replace the rear I/O assembly.
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 cover. See “Removing the computer cover” on page 14.
4. Remove the rear I/O assembly cover. See “Removing or reinstalling the rear I/O assembly cover”
on page 17.
5. Locate the rear I/O assembly. See “Component locations” on page 10.
Chapter 2
.
Installing or replacing hardware
43