2
Upgrading and Servicing Guide
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:
1
These 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.
2
Write 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.
3
It is recommended that you use an antistatic wrist strap and a conductive foam pad
when working on the computer.
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:
1
Remove any memory card or optical disc (CD or DVD) from the computer.
2
Shut down the computer.
3
Turn off the computer power supply by using the rocker switch on the back of the
chassis.
4
Disconnect the power cord from the electrical outlet and then from the computer.
5
Disconnect all other attached cables (such as the keyboard, mouse, and monitor
cables).
6
Disconnect all external devices.
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.
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.
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.