Removal and replacement procedures
Maintenance and Service Guide 4–35
Remove the audio/infrared board:
1. Disconnect the audio/infrared board cable 1 from the LIF connector on the system board.
2. Remove the one Phillips PM2.5×3.0 screw 2.
3. Release the clip 3 built into the base enclosure that secures the audio/infrared board.
4. Lift the audio/infrared board 4 straight up to remove it from the base enclosure.
Reverse this procedure to install the audio/infrared board.
USB board
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.
4. Remove the battery (see “Battery” on page 4-6).
5. Remove the following components:
a. Hard drive (see “Hard drive” on page 4-14)
b. Optical drive (see “Optical drive” on page 4-9)
c. Switch cover and keyboard (see “Switch cover and keyboard” on page 4-18)
d. Speaker assembly (see “Speaker assembly” on page 4-23)
e. Display assembly (see “Display assembly” on page 4-24)
f. Top cover (see “Top cover” on page 4-30)
Description Spare part number
USB board for use in computers with discrete graphics subsystems (includes cable) 516855-001
