Replacing The Power Supply Assembly - Lenovo ThinkCentre 3231 User Manual

7. Use the Setup Utility program to set the date, time, and any passwords. See

Replacing the power supply assembly

This section provides instructions on how to replace the power supply assembly.
To replace the power supply assembly:
Figure 18. Removing the retaining screws for the power supply assembly
26
User Guide
Chapter 4, "Using the Setup Utility," on page 57.
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
1. Remove the computer cover. See "Removing the computer cover" on page 14.
2. Disconnect the power supply assembly cables from the system board and all
drives. See "Locating parts on the system board" on page 11.
3. Lay the computer on its side and remove the four screws at the rear of the
chassis that secure the power supply assembly.
4. Remove the old power supply assembly from the chassis.
5. Ensure that the new power supply assembly is the correct replacement. If
your new power supply assembly has a voltage-selection switch, ensure that
you set the voltage-selection switch to match the voltage available at your
electrical outlet. If necessary, use a ballpoint pen to slide the voltage-selection
switch to a different position.
v If the voltage supply range in your local country or region is 100–127 V ac,
set the switch to 115 V.
v If the voltage supply range in your local country or region is 200–240 V ac,
set the switch to 230 V.