Friend came in with his X940BT which is about 8 months old.  It won't turn on at all.  Is there a hard reset button somewhere?  Fuse is good and there is power at the connector. 

Thanks for any help.

The unit I had in my truck had three fuses if I remember correctly? There was one on yellow, one on red and a small one on the back of the unit next to one of the plugs. The stereo shop I bought mine at said they will not turn on if there are no speakers connected so it could be that? They also noted a failed interface module will prevent the head from starting up. These may be wrong but they do have a test plug with speakers and different plugs to do the testing.