CAUTION: To avoid damaging the computer, perform the following steps before you begin working inside the computer.
1.Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.
2.Turn off your computer (see Turning Off Your Computer) and all attached devices.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
3.Disconnect all telephone or network cables from the computer.
4.Press and eject any installed cards from the Media Card Reader.
5.Disconnect your computer and all attached devices from their electrical outlets.
6.Disconnect all attached devices from your computer.
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the computer.
7.Remove the battery (see Removing the Battery).
8.Turn the computer