Lenovo 4285 Personal Computer User Manual


 
7. Remove the four screws 1 that secure the power supply and then remove the two screws 2 that
secure the power cord connector bracket. Note the routing of the power cord connector cable 3 . Lift
the power supply up to remove it from the computer main bracket.
Figure37. Removing the power supply
8. Remove the two screws 4 (as shown in Removing the power supplyFigure 37 on page 48) that secure
the power cord connector and then remove the power cord connector from the power cord connector
bracket.
9. Install the two screws to secure the new power cord connector to the power cord connector bracket.
10. Position the new power supply in the computer and align the four screw holes in the new power supply
with those in the computer main bracket. Install the four screws to secure the new power supply.
11. Route the new power cord connector cable and then position the power cord connector bracket on the
bottom of the computer main bracket.
12. Align the two screw holes in the power cord connector bracket with those in the computer main bracket
and install the two screws to secure the power cord connector bracket.
13. Connect the new power supply cable to the power supply connector on the system board. See “System
board part and connector locations” on page 12.
14. Reinstall the hard disk drive. See “Replacing the hard disk drive” on page 25.
15. Reinstall the rear I/O assembly cover. See “Removing or reinstalling the rear I/O assembly cover”
on page 19.
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 52.
48 ThinkCentre User Guide