My problem is that the media player sends out silence on the FM transmitter. I know the FM transmitter hardware works because other system sounds are broadcast to my FM receiver. I know the media player is working because it plays music through my N900 speakers. When I turn on the FM transmitter, I just get silence when the media player is running. It was working properly before the problem cropped up and I loved getting internet radio in my car. I did start a thread here on my problem. Luckily, my car stereo has an auxillery input, so I worked around the problem by purchasing a cabe to connect my N900 to the stereo. I guess I'm not alone in thinking Nokia's tech support is not very supportive.