Figure 30. Installing the new internal speaker

10.Reconnect the internal speaker cable and the thermal sensor cable to the system board. See “Locating parts on the system board” on page 9.

11.To reinstall the front bezel, align the three tabs on the front bezel with the corresponding holes in the chassis and pivot the front bezel inwards until it snaps into position.

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 32.

Replacing the keyboard or mouse

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 keyboard or mouse.

To replace the keyboard or mouse, do the following:

1.Remove any media from the drives. Then, turn off all attached devices and the computer.

2.Disconnect all power cords from electrical outlets.

3.Disconnect the old keyboard cable or mouse cable from the computer.

Chapter 2. Installing or replacing hardware 31

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Lenovo 3491, 3026, 3269, 3039, 5548, 5536, 5391, 5472, 5485 Replacing the keyboard or mouse, Installing the new internal speaker