Dell OptiPlex 755 User Manual page 28

2. Disconnect any telephone or telecommunication lines from the computer.
3. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
4. If applicable, remove the computer stand (for instructions, see the documentation that came with the stand) and the cable cover, if attached (see
Cover (Optional)).
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
5. Remove the computer cover.
For a mini tower computer, see
l
For a desktop computer, see
l
For a small form factor computer, see
l
For an ultra small form factor computer, see
l
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 any static electricity that could harm internal components.
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Removing the Computer Cover.
Removing the Computer Cover.
Removing the Computer Cover.
Removing the Computer Cover.
Cable