CAUTION: Before you perform this procedure, follow the safety instructions in the System Information Guide.
Shut down the computer through the Start menu.
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.
Disconnect any telephone or telecommunication lines from the
computer.
Disconnect your computer and all attached devices from electrical
outlets, and then press the power button to ground the system board.
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.
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.
