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Remove the USB board:
1. Disconnect the USB board cable (1) from the system board.
2. Remove the Phillips PM2.5×5.5 screw (2) that secures the USB board to the base enclosure.
3.
Remove the USB board (3).
Reverse this procedure to install the USB board.
Subwoofer
Description Spare part number
Subwoofer (includes subwoofer cable, top speakers passthrough cable, and 2 rubber isolators) 682097-001
Before removing the subwoofer, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 46), and then remove the following components:
a. Hard drive (see
Hard drive on page 47)
b. Optical drive (see
Optical drive on page 54)
c. Keyboard (see
Keyboard on page 57)
84 Chapter 4 Removal and replacement procedures