Dell Precision Workstation 690 User Manual page 29

NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer.
1. Turn off your computer (see
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
2. Disconnect all telephone or network cables from the computer.
3. Disconnect your computer and all attached devices from their electrical outlets.
4. Press the power button to ground the system board.
CAUTION: Your computer is heavy (it has an approximate minimum weight of 55 lbs) and can be difficult to maneuver. Seek assistance before
attempting to lift, move, or tilt it; this computer requires a two-man lift. Always lift correctly to avoid injury; avoid bending over while lifting. See
your Product Information Guide for other important safety information.
CAUTION: The computer stand should be installed at all times to ensure maximum system stability. Failure to install the stand could result in the
computer tipping over, potentially resulting in bodily injury or damage to the computer.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal components.
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Turning Off Your Computer).