Replacing The Internal Speaker; Removing The Rear Fan Assembly - Lenovo ThinkStation 4157 Hardware Installation And Replacement Manual

3. Remove the front bezel if you are replacing the front fan assembly. See "Removing the front bezel"
on page 12.
4. Disconnect the fan assembly cable from the system board. See "Identifying parts on the system board"
on page 8.
5. The fan assembly is attached to the chassis by four rubber mounts. Carefully remove the four rubber
mounts by breaking them or cutting them with scissors and then remove the fan assembly out of
the chassis.
Figure 39. Removing the rear fan assembly
6. Install the new fan assembly by aligning the four rubber mounts of the fan assembly with the holes on
the chassis and push the rubber mounts through the holes.
7. Pull on the tips of the rubber mounts until the fan assembly is in place.
8. Depending on which fan assembly you are replacing, reconnect the fan assembly cable to the adapter
card fan assembly connector or the rear fan assembly connector on the system board. See "Identifying
parts on the system board" on page 8.
9. If you are installing the hard disk drive fan assembly, reinstall the front bezel.
10. Go to Chapter 4 "Completing the parts replacement" on page 47.

Replacing the internal speaker

Attention: Do not open your computer or attempt any repair before reading and understanding the "Important safety
information" in the ThinkStation Safety and Warranty Guide that came with your computer. To obtain a copy of the
ThinkStation Safety and Warranty Guide, go to:
http://support.lenovo.com
This section provides instructions on how to replace the internal speaker.
To replace the internal speaker:
1. Remove the computer cover. See "Removing the computer cover" on page 11.
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ThinkStation Hardware Installation and Replacement Guide