Sony PCG-R505DSK - Manual (Page 207)

Troubleshooting Audio
207
❑ If the speakers are powered by batteries, verify the batteries are inserted
properly and are charged.
❑ If you have connected an audio cable to the Headphone jack, disconnect the
cable.
❑ If you are still experiencing problems, use the Driver Recovery CD to
reinstall the drivers. See “Using the Driver Recovery CD(s)” for more
information.
My microphone does not work.
If you are using an external microphone, verify that the microphone is plugged
into the Microphone jack. See “Connecting an External Microphone” for more
information.