CAUTION 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. You must disconnect the
power cord to avoid damage to the internal components of the computer.
5. Remove the computer access panel.
CAUTION After removing the access panel, look for the LED on the system board to the
right of the DIMM sockets. If the LED is illuminated, the system still has power. Turn off the
computer and remove the power cord before proceeding.
6. Locate the correct vacant expansion socket on the system board and the corresponding expansion
slot on the back of the computer chassis.
7. Push down and out on the two green thumb tabs inside the chassis and rotate the expansion card
retention latch up.
Figure 2-10 Opening the Expansion Slot Retainer
8. Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
22 Chapter 2 Hardware Upgrades ENWW
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