Accessing The System Board Components And Drives; Installing Or Replacing A Memory Module - Lenovo ThinkCentre M90 3244 User Manual

Accessing the system board components and drives

This section provides instructions on how to access the system board components
and drives.
To access the system board components and drives, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Open the computer cover. See "Opening the computer cover" on page 14.
3. Pivot the optical drive bay assembly upward to access the internal components.
Figure 7. Pivoting the optical drive bay assembly

Installing or replacing a memory module

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User Guide
On some models, you might need to remove the hard disk drive to access some
internal components. See "Replacing the hard disk drive" on page 22.
Notes:
a. Make sure you note the locations of any cables that you disconnect from the
drives or the system board.
b. Make sure the hard disk drive assembly is in the latched down position
before closing the computer cover to prevent damage to the hard disk drive.
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