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4. Remove the reader and cable assembly from the top cover (4).
Reverse this procedure to install the fingerprint reader board.
Speaker assembly
NOTE: In 4540s models, the speakers are mounted to the bottom of the top cover.
NOTE: In 4440s/4441s models, the speakers are mounted to the base enclosure.
Description Spare part number
Speaker assembly for use in 4540s models 683505-001
Speaker assembly for use in 4440s/4441s models 683665-001
Before removing the speaker assembly, 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.
76 Chapter 4 Removal and replacement procedures