6. Disconnect the modem module cable (3) from the modem module.
7. Remove the audio board.
Reverse this procedure to install the audio board.
Modem module
NOTE: The modem module spare part kits do not include a modem module cable. The modem module
cable is included in the Cable Kit, spare part number 487138-001.
Description Spare part number
For use in all countries and regions except Australia and New Zealand 491575-001
For use only in Australia and New Zealand 491575-011
Before removing the modem module, 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:
a. Hard drive (see
Hard drive on page 52)
b. Optical drive (see
Optical drive on page 55)
c. Keyboard (see
Keyboard on page 60)
d. Switch cover (see
Switch cover on page 65)
e. Display assembly (see
Display assembly on page 74)
86 Chapter 4 Removal and replacement procedures
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