Dell Dimension 5150 Owner's Manual page 102

4 Using the tabs as leverage, rotate the cover downward and press down to close it.
computer cover
back of computer
bottom hinges
5 Ensure that the cover is seated correctly before moving it to the upright position.
NOTICE:
To connect a network cable, first plug the cable into the network device and then plug it into the computer.
6 Connect your computer and devices to electrical outlets, and turn them on.
102
Removing and Installing Parts