Dell OptiPlex GX270 - Manual (Page 144)

After you open and close the cover, the chassis intrusion detector, if enabled, causes the following message to appear on the screen at the next
computer start-up:
ALERT! Cover was previously removed.
16. Reset the chassis intrusion detector by changing Chassis Intrusion to Enabled or Enabled-Silent.
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.
5. Remove the insert from the insert frame by pressing on the four tabs.
NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion
detector.
CAUTION: Before you begin any of the procedures in this section, follow the steps in " Safety Instructions ."