Replacing The Fixed Power Supply - Lenovo System x3250 M4 Installation And Service Manual

Step 1. Disconnect the ac power cord from the connector on the power supply that you are removing.
Disconnect all external cables.
Step 2. Remove the cover (see "Removing the cover" on page 131).
Attention: To ensure proper cooling and airflow, do not operate the server for more than 30
minutes with the top cover removed.
Step 3. Remove the hard disk drive backplane or backplate assembly (see "Removing the simple-swap
hard disk drive backplate assembly" on page 172 or "Removing the hot-swap hard disk drive
backplane" on page 179).
Step 4. Disconnect the power-supply cables from the connectors on the system board and internal
devices; then, disengage the cables from any retention-clips.
Note: Note the routing of all power-supply cables; you will route the power-supply cables the
same way when you install the power supply.
Step 5. Remove the screw that holds the power supply to the rear of the chassis.
Step 6. Loosen the captive thumbscrew that secures the rear of the power supply to the chassis bottom.
Step 7. Lift the power supply out of the bay.
If you are instructed to return the server component or optional device, follow all packaging instructions,
and use any packaging materials for shipping that are supplied to you.

Replacing the fixed power supply

Use this information to replace the fixed power supply.
When you remove or install the fixed power supply, observe the following precautions.
Statement 8
Captive screw
Power supply
Rear screw
.
Chapter 6 Removing and replacing components
183