I just recently found a problem with my f90bt it will turn on play music and then shuts down whenever it feels. It is hot here so I thought maybe it was an over heating issue with the fan not being able to push enough cold air to it then I though wires are loose. I haven't seen anyone with the same problem. Sometimes it will play the music then start to skip trying to play the doing and will reboot. It doesn't this no matter what you are in GPS, video, music. If anyone can help chime in if they have had the same problem that would be great. Thanks Aaron