Dell GX280DT - GX280 Desktop Computer User Manual page 246

1 power cable
2 hard-drive cables
10. Close the computer cover.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
11. Connect your computer and devices to their electrical outlets, and turn them on.
12. See the documentation that came with the drive for instructions on installing any software required for drive operation.
After you open and close the cover, the chassis intrusion detector, if installed and enabled, causes the following message to appear on the screen at
the next computer start-up:
ALERT! Cover was previously removed.
13. Reset the chassis intrusion detector
NOTE: If an admin password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion
detector.
Front-Panel Inserts
If you are installing a new floppy or CD/DVD drive instead of replacing a drive, remove the front-panel inserts.
1. Open the cover to a 90-degree angle.
2. Locate the insert that is in front of the drive bay that you want to use.
3. From inside the computer, press in the release tab of the insert.
4. From the outside of the computer, pull the insert away from the computer's front panel.
by changing Chassis Intrusion to On or On-Silent.