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Opening the Computer Cover
Dell Precision™ Workstation 350 Service Manual
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System 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 and attached 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 then unplug 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 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.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
6.Lay the computer on its side as shown in the following illustration.
NOTICE: Ensure that sufficient space exists to support the open
7.Open the cover:
a.Facing the back of the computer, press the release button on the right side of the computer with one hand while pulling up on the top of the cover with the other hand.
b.Press the release button on the left side of the computer with one hand 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 pull open the cover with the other hand.
1release buttons (2)
2padlock ring
3security cable slot
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