Dell Dimension 4550 Dell Dimension 4550 Owner's Manual - Page 83
Opening the Computer Cover
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Opening the Computer Cover CAUTION: Before you begin any of the procedures in this section, follow the safety instructions on page 9. CAUTION: To guard against electrical shock, always unplug your computer 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 your computer and then unplug it from the network wall jack. 2 Turn off any attached devices and disconnect them from their electrical outlets. 3 Disconnect the computer power cable from the wall outlet, and then press the power button to ground the system board. NOTICE: Ensure that sufficient space exists to support the open cover-at least 30 cm (1 ft) of desktop space. 4 Lay the computer on its side so that the arrow on the bottom of the computer points up. 5 Locate the two release buttons shown in the illustration, and then press the two release buttons as you lift the cover. release button arrow release button Adding Pa rts 83