156 Microproc ess or Air flow Shroudw w w . d e l l . c o m | s u p p o r t . d e l l . c o m CAUTION: Before you perform this procedure, follow the safety instructions intheSystem Information Guide.1 Shut down the computer through the Start menu.2 Ensure that your computer and attached devices are turned off. If your computer andattached devices did not automatically turn off when you shut down your computer,turn them off now.NOTICE: To disconnect a network cable, first unplug the cable from your computer and thenunplug it from the network wall jack.3 Disconnect any telephone or telecommunication lines from the computer.4 Disconnect your computer and all attached devices from electrical outlets, and thenpress the power button to ground the system board.5 If you have installed a padlock through the padlock ring on the back panel, remove thepadlock.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before opening the cover.NOTICE: Before touching anything inside your computer, ground yourself by touching anunpainted metal surface, such as the metal at the back of the computer. While you work,periodically touch an unpainted metal surface to dissipate any static electricity that could harminternal components.6 Open the computer cover.Removing the Microprocessor Airflow ShroudCAUTION: Before you perform this procedure, follow the safety instructions intheSystem Information Guide.NOTICE: To avoid damaging the fan power cables, do not slide the shroud too quickly.1 Press the shroud release lever towards the front of the computer.2 Lift the shroud up to disengage the anchors.3 Once the shroud has been disengaged from the anchors, unplug the fan cables fromtheir connectors on the system board.
