USB 3.0 board
NOTE: When replacing the system board, be sure to remove the USB 3.0 board from the old
system board and install it on the new system board.
Description Spare part number
USB 3.0 board 642762-001
Before removing the USB 3.0 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 63).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 70).
b. Hard drive (see
Hard drive on page 76)
c. Optical drive (see
Optical drive on page 72)
d. Fan (see
Fan on page 90)
e. Heat sink (see
Heat sink on page 91)
f. Keyboard (see
Keyboard on page 96)
g. Bottom cover (see
Bottom cover on page 98)
h. System board (see
System board on page 116)
Remove the USB 3.0 board:
1. Position the system board right-side up.
2. Remove the two Phillips PM2.0×3.0 screws (1) that secure the USB 3.0 board to the system
board
120 Chapter 4 Removal and replacement procedures
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