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3. Disengage the audio cable (1), disconnect the board (2), and then remove the USB board (3).
Reverse this procedure to install the USB board and cables.
Fingerprint reader board
Description Spare part number
Fingerprint reader board 720236-001
Before removing the Fingerprint reader 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 service cover (see
Service cover on page 47).
6. Remove the hard drive (see
Hard drive on page 48).
7. Remove the memory modules (see
Memory modules on page 51).
Component replacement procedures
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