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Opening the Computer Cover
DellPrecision™Workstations450and650User'sGuide
1. Shut down the computer through the Start menu.
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your computer, turn them off now.
3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from electrical outlets, and then press the power button to ground the system board.
5. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.
6. Lay the computer on its side as shown in the illustration.
7. Open the computer cover:
a. Slide the cover release latch toward the top of the computer.
b. Raise the cover, and pivot it toward the front of the computer.
8. Ground yourself by touching an unpainted metal surface on the computer, such as the metal at the back of computer, before touching anything inside
your computer.
While you work, periodically touch any unpainted metal surface on the computer to dissipate any static electricity that could harm internal components.
Dell Precision 650
Dell Precision 450
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System Information Guide.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Ensure that sufficient space exists to accommodate the open cover—at least 30 cm (1 ft) of desk top space.
1
cover release latch
2
security cable slot
3
padlock ring