USB board
Description Spare part number
USB board (includes cable) 855010-001
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 38).
5. Remove the optical drive (see Optical drive on page 39), if installed.
6. Remove the bottom cover (see Bottom cover on page 42).
7. Remove the hard drive, hard drive cable, and hard drive board (see Hard drive on page 50).
To remove the USB board:
1. Disconnect the USB board cable from the system board (1) and lift the cable to disengage the adhesive 
that secures it to the computer..
2. Remove the Phillips PM2.0×3.0 screw (2) that secures the USB board to the computer.
3. Remove the USB board and cable (3).
Reverse this procedure to install the USB board.
54 Chapter 6   Removal and replacement procedures for Authorized Service Provider parts