Replacing The Power Supply Assembly - Lenovo ThinkStation E31 Hardware Maintenance Manual

9. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 87.
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 118.

Replacing the power supply assembly

Attention:
Do not open your computer or attempt any repair before reading and understanding "Important Safety Information"
on page 1.
This section provides instructions on how to replace the power supply assembly.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety and proper Underwriters Laboratories (UL) certification.
CAUTION:
Hazardous moving parts. Keep fingers and other body parts away.
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. If you suspect a problem with
one of these parts, contact a service technician.
To replace the power supply assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See "Removing the computer cover" on page 86.
3. Disconnect the power supply assembly cables from the system board and all drives. See "Locating
parts on the system board" on page 74.
4. Release the power supply assembly cables from the cable clips and ties in the chassis.
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Chapter 10 Replacing FRUs (for machine types: 2551, 2552, 2553, 2554, and 2555)
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