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USB board
Description Spare part number
USB board 686314-001
Before removing the USB board, 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 81), and then remove the following components:
a. Service cover (see
Service cover on page 83)
b. Optical drive (see
Optical drive on page 84)
c. Hard drive (see
Hard drive on page 87)
d. WWAN module (see
WWAN module on page 92)
e. WLAN module (see
WLAN module on page 94)
f. Fan (see
Fan on page 100)
g. Keyboard (see
Keyboard on page 101)
h. Base enclosure (see
Base enclosure on page 107)
Remove the USB board:
1. Release the clip (1) built into the top cover that secures the left side of the USB board.
2. Lift the left side of the USB board (2) to disconnect the board from the system board.
Component replacement procedures
119