Halp plz. Its been intermittently cutting out for a while and now its fully done for it seems. Its getting power and running (the screen shows it as playing) but no sound at all. Checked the wiring to the head unit and everything is fine there. Not sure of the speaker wiring because I have to pull the full door cards to get at it. I think the head unit I borked but was wondering if you guys have come across this before ? Kit: 4 pioneer 13cm speakers, 2 front 2 back, 2 blaupunkt tweeters and a cheapish Pioneer HU.