9.Insert the two retaining clips 1 of the hard disk drive bracket into the corresponding holes in the side of the optical drive bay, and then pivot the hard disk drive and bracket downwards until the hard disk drive bracket snaps into position.

Figure 24. Installing the hard disk drive

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 52.

Replacing the optical 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

This section provides instructions on how to replace the optical drive.

To replace the optical drive, 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.Remove the front bezel. See “Removing and reinstalling the front bezel” on page 15.

4.Remove the hard disk drive. See “Replacing the hard disk drive” on page 27.

30ThinkCentre User Guide

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Lenovo 3120, 3122, 3128, 3126 manual Replacing the optical drive, Installing the hard disk drive