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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 40).
5. Remove the following components:
a. Optical drive (see
Optical drive on page 41)
b. Hard drive (see
Hard drive on page 43)
c. Keyboard (see
Keyboard on page 52)
d. Keyboard cover (see
Keyboard cover on page 54)
e. Display assembly (see
Display assembly on page 57)
f. Top cover (see
Top cover on page 64)
g. Speakers (see
Speakers on page 72)
Remove the USB board:
1. Disconnect the USB board cable (1) from the system board.
2. Remove the num lock LED cable (2) from the light cover built into the base enclosure.
3. Remove the USB board (3) from the base enclosure.
Reverse this procedure to install the USB board.
System board
NOTE: All system board spare part kits include UMA graphics subsystem memory, built-in modem,
and replacement thermal material.
74 Chapter 4 Removal and replacement procedures