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6. Remove the two screws that secure the front panel connectors assembly to the chassis and then release
the front panel connectors assembly from the chassis.
7. Align the screw holes in the new front panel connectors assembly with the holes in the chassis. Install
the two screws to secure the assembly.
8. Reconnect all the cables to the system board. See “Locating parts on the system board ” on page 113.
9. Reinstall the hard disk drive fan bracket if removed.
10. Reinstall the front bezel.
11. Go to “Completing the FRU replacement” on page 108.
Replacing the power switch/LED assembly
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://www.lenovo.com/support.
This procedure describes how to remove and replace the power switch/LED assembly.
1. Remove the computer cover. See “Removing the cover” on page 110.
2. Remove the front bezel. See “Removing the front bezel” on page 114
3. Disconnect the power switch/LED assembly cable from the system board. See “Removing the front
bezel” on page 114.
4. Note the power switch/LED assembly cable routing and the position of the two LEDs.
5. Remove the switch and the LEDs from the bezel.
Chapter 11. Replacing FRUs (Type 4155, 4158, 4218) 135