To avoid injury and equipment damage, always follow this procedure before opening the computer:
1Remove any of the following:
Memory card from the memory card reader
Optical disc (CD or DVD) from the optical drive
Pocket Media Drive from the Pocket Media Drive bay
2Turn off the computer. Click the Windows Start Button®, click the Arrow button next to the Lock button, and then click Shut Down.
3Disconnect the modem/telephone cable, if present.
WARNING: Always disconnect the modem cord from the telephone system before opening the cover.
4Disconnect the power cord from the electrical outlet and then from the computer.
WARNING: To reduce the risk of personal injury from electrical shock or hot surfaces, disconnect the power cord from the electrical outlet. Then disconnect the computer from the power source before removing the computer cover. Failure to do so before you open the computer or do any procedures can result in personal injury or equipment damage.
5Disconnect all other attached cables (such as the keyboard, mouse, Ethernet, and monitor).
6Disconnect all external devices.
Upgrading and Servicing Guide 3