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Chassis Intrusion Switch
Dell™OptiPlex™GX400ServiceManual
Removing the Chassis Intrusion Switch
Replacing the Chassis Intrusion Switch
Removing the Chassis Intrusion Switch
1. Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
2. Remove the front panel.
3. Remove the AGP card brace or AGP card clip.
4. Remove all expansion cards.
5. Remove the hard drive bracket.
6. Remove the expansion-card guide.
7. Disconnect the chassis intrusion switch cable from the control-panel connector (ALERT). To locate this connector, see "Control Panel Components."
8. Slide the chassis intrusion switch up out of its slot on the chassis.
9. Lift the chassis intrusion switch and switch cable away from the chassis.
Removing the Chassis Intrusion Switch
Replacing the Chassis Intrusion Switch
To replace the chassis intrusion switch, perform the removal procedure in reverse.
CAUTION: Before you perform this procedure, see "Precautionary Measures."
NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system
board has turned off. To locate this light, see "System Board Components."