USB board
Description Spare part number
USB board 856613-001
Before removing the USB board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst 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 32).
5. Remove the optical drive (see Optical drive on page 33).
6. Remove the bottom cover (see Bottom cover on page 39).
To remove the USB board:
1. Disconnect the cable from the USB board (1)
2. Remove the Phillips PM2.0×4.0 screw (2) that secures the USB board to the computer.
3. Remove the USB board (3).
Reverse this procedure to install the USB board.
54 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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