Report "I have a power acoustic PTID 8920. I believe all the wiring is correctly connected and the fuses are still good. However the face plate buttons do not work but my open screen button and eject disc button still work (when depressed the whole unit lights up momentarily then dies). Those two buttons are not on the detachable part and they work but the power button is on the detachable part and none of those buttons work. What is wrong?"