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Before removing the USB 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 46).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 47)
b.
Wireless module compartment cover (see
WLAN module on page 50)
c.
Optical drive (see
Optical drive on page 57)
d.
Keyboard (see
Keyboard on page 59)
e.
Switch cover (see
Switch cover on page 62)
f.
Display assembly (see
Display assembly on page 64)
g.
Top cover (see
Top cover on page 70)
Remove the USB board:
1. Disconnect the USB board cable (1) from the system board. The USB board cable is included in the
Cable Kit, spare part number 430474-001.
2. Remove the Phillips PM2.5×4.0 screw (2) that secures the USB board to the computer.
3. Lift the USB board (3) straight up to remove it from the computer.
4. Remove the num lock light (4) from the clip built into the base enclosure.
Reverse this procedure to install the USB board.
Component replacement procedures 81