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Dell™ OptiPlex™ 760 Service Manual

  Chassis Intrusion Switch


Chassis Intrusion Switch

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

Removing the Chassis Intrusion Switch

  1. Follow the procedures in Working on Your Computer.

  2. Remove the computer cover (see Removing the Computer Cover).

  3. Remove the hard drive (see Removing a Hard Drive).

  4. Disconnect the chassis intrusion switch cable from the system board by using two fingers to squeeze the release mechanism on one side of the connector as you pull to disconnect the cable connector.

  5. Slide the chassis intrusion switch out of its slot in the metal bracket, and then push it down through the square hole in the bracket to remove the switch and its attached cable from the computer.

NOTE: You may feel a slight resistance as you slide the switch out of the slot.

Replacing the Chassis Intrusion Switch

  1. Gently insert the switch from underneath the metal bracket into the square hole in the bracket, and then slide the chassis intrusion switch into its slot until it snaps securely into place.

  2. Reconnect the cable to the system board.

  3. Replace the hard drive (see Installing a Hard Drive).

  4. Replace the computer cover (see Replacing the Computer Cover).

  5. If you are using a computer stand, attach it to the computer.

Resetting the Chassis Intrusion Detector

  1. Turn on (or restart) your computer.

  2. When the DELL™ logo appears, press <F12> immediately.

If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft® Windows® desktop. Then shut down your computer and try again.

  1. Select System Setup.

  2. Select Security ®Chassis Intrusion and then select the Clear Intrusion Warning option to reset the chassis intrusion detector. Change the setting to On, On-Silent, or Disabled.

NOTE: The default setting is On-Silent.
  1. Save your BIOS settings and exit system setup.

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