Philips MCP9350i Service Manual page 28

EN 28 11.
11.19. Microphone, Headphones and Headphones Volume Control
11.19.1. Required Equipment
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PC Doctor CD & USB dongle
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Headset (combined headphones/microphone) with two 9mm jack plugs
11.19.2. Test Procedure
1. In PC Doctor: Run the microphone test and follow the instructions.
2. Play the recorded sound a number of times, using the volume buttons to increase and decrease the volume.
11.19.3. Fail Procedure
Replace the FP Audio cable.
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- Replace the FP I/O board. See paragraph 12.12.3.
Replace the motherboard. See paragraph 12.16.9.
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MCP9350i Hardware Tests