1. Put on your electrostatic discharge (ESD) wrist strap to avoid damaging any circuitry.
2. Remove all devices (such as diskettes and CD-ROMs) from the computer.
3. Power off the computer and any peripheral devices that are connected to it.
4. Disconnect the power cord from the electrical outlet and then from the computer. When the computer is plugged into an AC power source, there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.
5. Disconnect all peripheral device cables from the computer.

Static electricity can damage electrical components. Before removing or replacing a component, touch a grounded metal object to discharge static electricity. Also observe the following precautions to prevent damage to electric components and accessories:

• To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
• Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.
• Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.
• Place items on a grounded surface before removing them from their container.
• Always be properly grounded when touching a sensitive component or assembly.
• Avoid contact with pins, leads, or circuitry.
• Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam.

• During disassembly, label each cable as you remove it, noting its position and routing. This will make the replacement of the cables much easier, and will ensure that the cables are rerouted properly to protect the cables.
• Keep all screws with the units removed. The screws used in the computer are of different thread sizes and lengths; using the wrong screw in a component could damage the unit.