Dell E521 Personal Computer User Manual


 
Replacing the Power Supply
1. Follow the procedures in Before You Begin.
2. Remove the computer cover (see Removing the Computer Cover).
3. Disconnect the DC power cables from the system board and the drives.
Note the routing of the DC power cables underneath the tabs in the computer chassis as you remove them from the system board and drives. You must
route these cables properly when you replace them to prevent them from being pinched or crimped.
4. Remove the hard drive cable, CD/DVD drive data cable, front panel ribbon cable, and any other cables from the securing clip on the side of the power
supply.
5. Remove the four screws that attach the power supply to the back of the computer chassis.
6. Press the release button located on the floor of the computer chassis.
7. Slide the power supply toward the front of the computer by approximately 1 inch.
8. Lift the power supply up and out of the computer.
9. Lower the replacement power supply into the computer.
10. Slide the power supply toward the back of the computer until the release button snaps into the locking position.
11. Replace the screws that secure the power supply to the back of the computer chassis.
12. Reconnect the DC power cables to the system board and drives.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your
computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.
1
release button
2
power supply
3
screws (4)
4
AC power connector
NOTICE: Route the DC power cables under the chassis tabs. The cables must be properly routed to prevent the cables from being damaged.