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
Description Spare part number
USB board for use with computer models equipped with graphics subsystems with UMA graphics
memory (includes cable)
516497-001
USB board for use with computer models equipped with graphics subsystems with discrete
graphics memory (includes cable)
516855-001
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.
4. Remove the battery (see
Battery on page 59).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 69).
b. Optical drive (see
Optical drive on page 62).
c. Switch cover and keyboard (see
Switch cover and keyboard on page 76).
d. Display assembly (see
Display assembly on page 81).
e. Top cover (see
Top cover on page 91).
98 Chapter 4 Removal and replacement procedures
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