Hardware Reference Guide

Preparing for disassembly
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as compact discs and USB ash drives, from the computer.
3. Turn o the computer properly through the operating system, and turn o any external devices.
4. Disconnect the power cord from the AC outlet and disconnect any external devices.
IMPORTANT: Regardless of the power-on state, voltage is always present on the system board as long
as the system is plugged into an active AC outlet. To prevent damage to internal components, you must
disconnect the AC power cord from the power source before opening the computer.
Removing the computer access panel
To access internal components, you must remove the access panel.
1. Prepare for disassembly. See Preparing for disassembly on page 6.
2. If the computer is on a stand, remove the computer from the stand and lay the computer down.
3. Slide the access panel release lever to the right so that it locks into place (1). Then slide the access panel
toward the rear of the computer (2) and lift it o the computer (3).
6 Chapter 2 Hardware upgrades