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 their electrical outlets, and
then press the power button to ground the system board.
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.
Disconnect the AC power cable from the AC power connector on the back of the
power supply.
Unplug the DC power cables from the drives and system board.
Disconnect the fan power cable from its connector on the system board.
Pull the fan release lever away from the back of the computer and slide the fan toward
the release lever.
Remove the fan assembly from the computer.
Replacing the Fan Assembly
Align the fan assembly tabs with the holes in the back of the computer.
Slide the fan assembly away from the fan release lever until it clicks in place.
Reconnect the DC power cables to the drives and system board.
