Dell Precision 390 User Manual

Also see for OptiPlex 390: Setup & features Quick reference guide Specifications Specifications Setup & features

Contents

7. Release the cover from the hinge tabs and set it aside in a secure location.Removing the Front Panel1. Follow the procedures in Before You Begin.2. Remove the computer cover (see Removing the Computer Cover).3. Lift the front-panel release lever and slide the panel to the left to disengage and remove the front panel.Chassis Intrusion SwitchRemoving the Chassis Intrusion Switch1. Follow the procedures in Before You Begin.2. Remove the computer cover (see Removing the Computer Cover).3. Disconnect the chassis intrusion switch cable from the system board.Note the routing of the chassis intrusion switch cable as you remove it from the chassis. Chassis hooks may hold the cable in place inside the chassis.4. Using a flat blade screwdriver, gently slide the chassis intrusion switch out of its slot, and remove the switch and its attached cable from the computer.CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of yourcomputer's electronic components. You can do so by touching an unpainted metal surface on the computer.NOTE: If you have a desktop computer, the drives will appear differently.CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of yourcomputer's electronic components. You can do so by touching an unpainted metal surface on the computer.