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e. Display assembly (see Display assembly on page 64).
f. Top cover (see
Top cover on page 74).
Remove the audio/infrared board:
1. Remove the Phillips PM2.5×5.0 screw (1) that secures the audio/infrared board to the base
enclosure.
2. Release the audio/infrared board cable from the clip (2) built into the base enclosure.
3. Lift the audio/infrared board (3) straight up.
4. Disconnect the audio/infrared board cable from the system board (4), and then remove the audio-
infrared board from the base enclosure.
Reverse this procedure to install the audio/infrared board.
USB board
Description Spare part number
USB board for use in computers with discrete graphics subsystems (includes cable) 516332-001
USB board for use in computers with UMA graphics subsystems (includes cable) 518168-001
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.
Component replacement procedures 83