84 Adding Partsw w w . d e l l . c o m | s u p p o r t . d e l l . c o mOpening the Computer CoverCAUTION: Before you begin any of the procedures in this section,follow the steps listed in the safety instructions on page 12CAUTION: To guard against electrical shock, always unplug yourcomputer from the electrical outlet before opening the cover.1 Shut down the computer (see page 33).NOTICE: To disconnect a network cable, first unplug the cable from yourcomputer and then unplug it from the network wall jack.2 Turn off any attached devices and disconnect them from theirelectrical outlets.3 Disconnect the computer power cable from the wall outlet, and thenpress the power button to ground the system board.NOTICE: Ensure that sufficient space exists to support the open cover—atleast 30 cm (1 ft) of desk top space.4 Lay the computer on its side so that the arrow on the bottom of thecomputer points up.5 Open the cover:a Facing the back of the computer, press the release button on theright side of the computer with one hand while pulling up on thetop of the cover with the other hand.b Press the release button on the left side of the computer with onehand while pulling up on the top of the cover with the other hand.c Hold the bottom of the computer with one hand, and then pullopen the cover with the other hand.
