CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions."
NOTICE: Before you disconnect a device from the computer or remove a component from the
system board, verify that the standby power light on the system board has turned off. To locate
the light, see "System Board."
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 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.
Open the computer 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.
