Lenovo ThinkCentre M90 Hardware Maintenance Manual page 105

3. Locate the internal speaker connector on the system board. See "Locating parts on the system board"
on page 70.
4. Disconnect the internal speaker cable from the system board.
5. Push the metal tab 1
to completely remove it from the chassis.
Figure 35. Removing the old internal speaker
6. Position the new internal speaker into the four metal clips
until it is secured in place.
.
Chapter 8 Replacing FRUs (Machine Types: 3029, 3054, 3139, 3219, 3246, 3282, 3349, 3421, 3544, 3652, 3769, 3934,
on the top of the internal speaker outward and slide the internal speaker upward
4992, 5206, 5267, 5325, 5384, 5450, 5474, 5498, 5554, 5852, 6232, and 6590.)
1 and push downward on the internal speaker
97