Chassis Intrusion Switch - Dell Precision WorkStation 420 Service Manual

1. Disconnect the control panel cable from the PANEL connector on the system board (see
2. Remove the mounting screw that secures the control panel to the chassis.
3. Disconnect the chassis intrusion switch cable connector from the control panel.
4. Disconnect the thermal sensor cable connector from the control panel.
5. Disconnect the speaker cable connector from the control panel.
6. Remove the control panel and cable from the chassis.
To reinstall the control panel, perform the removal procedure in reverse.
When you reinstall the control panel, be sure to align the control panel alignment hole and the guide pin located on the left side of the chassis front.

Chassis Intrusion Switch

Figure 10. Chassis Intrusion Switch Removal
CAUTION: Before you remove the computer cover, see
To remove the chassis intrusion switch, perform the following steps:
1. From inside the chassis, slide the chassis intrusion switch to the side to release it from the chassis.
2. Disconnect the chassis intrusion switch cable connector from the control panel (see Figure 9).
3. Remove the chassis intrusion switch and cable from the chassis.
Note the routing of the chassis intrusion cable to ensure the replacement is routed in the same manner.
4. Install the replacement chassis intrusion switch.
5. Replace the computer cover. Then reconnect your computer and peripherals to their power sources, and turn them on.
NOTE: After you remove and replace the cover, the chassis intrusion detector will cause the following message to be
displayed at the next system start-up:
ALERT! Cover was previously removed.
6. To reset the chassis intrusion detector, enter System Setup, select System Security, and reset Chassis Intrusion to Enabled or
Enabled-Silent.
Drives
Figure 22
1 Control panel
2 Screw
3 Chassis intrusion switch
"Precautionary Measures"
for the location of the PANEL connector).