I have this problem as well. mine started happening about 6 months after initially installing my F90bt. I noticed when it is very cold outside(canadian) my deck appears to be operating fine but i get no sound. i believe it is the Metra harness that i have. When my car warms up and i re-start my car the F90Bt boots up with sound. I think it may be my car doesnt have enough "juice" to start the metra harness when its cold, which seems really weird since it starts the car fine.
anyone else have this problem?
