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Remove the audio board:
1. Turn the computer upright with the front toward you.
2. Disconnect the audio board cable (1) from the system board.
3. Remove the cable from between the components that secure it in the base (2).
4. Remove the two Phillips PM2.5×3.0 screws (3) that secure the audio board to the computer.
5. Lift the rear edge of the audio board and swing it forward until the audio connectors disengage
from the base enclosure.
6. Remove the audio board (4).
Reverse the above procedure to install the audio board.
USB board
Description Spare part number
USB board 486842-001
USB board cable 486843-001
Before removing the USB board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
78 Chapter 4 Removal and replacement procedures