Preparing the computer

Before you can upgrade any component in your computer, you must prepare the computer so that you can safely handle it and its components.

Read the following items before attempting to upgrade or service the computer:

1These procedures assume familiarity with the general terminology associated with personal computers, and with the safety practices and regulatory compliance required for using and modifying electronic equipment.

2Write down and save the computer model and serial numbers, all installed options, and other information about the computer. It is easier to consult this information than to open and examine the computer.

3It is recommended that you use an antistatic wrist strap and a conductive foam pad when working on the computer.

WARNING: Always disconnect the computer from the power source before opening the computer or removing panels. Failure to do so before you open the computer or do any procedures can result in personal injury or equipment damage.

Before opening the computer

To avoid injury and equipment damage, always perform the following steps, in the order in which they are listed, before opening the computer:

1Remove any memory card or optical disc (CD or DVD) from the computer.

2Shut down the computer.

3Turn off the computer power supply by using the rocker switch on the back of the chassis.

4Disconnect the power cord from the electrical outlet and then from the computer.

CAUTION: To reduce the risk of personal injury from electrical shock or hot surfaces, disconnect the power cord from the wall electrical outlet, and allow the internal computer components to cool before touching them.

5Disconnect all other attached cables (such as the keyboard, mouse, and monitor cables).

6Disconnect all external devices.

CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Ensure that you are discharged of static electricity by briefly touching a grounded metal object.

2Upgrading and Servicing Guide