Dell OptiPlex 755 User's Guide - Page 220

2 1 1 power supply 2 mounting screw 7 Slide the power supply toward the front of the computer approximately 1 inch. 8 Lift the power supply up and out of the computer. 9 Slide the replacement power supply into place. 10 Replace the screws that secure the power supply to the back of the computer chassis. 11 Reconnect the DC power cables to the system board and drives (see "System Board Components" on page 172 for connector locations). 12 Replace the floppy drive or media card reader (see "Installing a Floppy Drive" on page 208). 13 Replace the optical drive (see "Installing an Optical Drive" on page 205). 14 Replace the computer cover (see "Replacing the Computer Cover" on page 317). 15 Connect the AC power cable to the power supply AC power connector. NOTICE: To connect a network cable, plug the cable into the network wall jack and then plug it into the computer. 16 Connect your computer and devices to electrical outlets, and turn them on. 220 Power Supply