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Replacing the power supply assembly - ThinkCentre M81 (type 0268, 1730, 4166, 4169, 5030, 5048, 5069, 7517)

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 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.

danger iconDANGER

caution
CAUTION
Never remove the cover on a power supply or any part that has the following label attached.
danger2
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".
  3. Disconnect the power supply assembly cables from the system board and all drives. See "Locating parts on the system board".
  4. Release the power supply assembly cables from the cable clips and ties in the chassis.
  5. Lay the computer on its side and remove the four screws at the rear of the chassis that secure the power supply assembly.

Removing the screws for the power supply assembly
Figure1. Removing the screws for the power supply assembly

  1. Slide the power supply assembly to the front of the computer and then lift it out of the chassis.
  2. Ensure that the new power supply assembly is the correct replacement.
  3. Install the new power supply assembly into the chassis so that the screw holes in the power supply assembly align with those in the chassis.
  4. Install and tighten the four screws to secure the power supply assembly.
    Note: Use only screws provided by Lenovo.
  5. Reconnect the power supply assembly cables to the system board and each of the drives.
  6. Secure the power supply assembly cables with the cable clips and ties in the chassis.
  7. To complete the installation or replacement, go to "Completing the parts replacement".
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  • Alias ID: MIGR-77358
  • Document ID: PD008919
  • Last Updated :6/17/2014
  • (c) 2014 Lenovo