Ground loop, a lil different i think.
Ok i know alot of different threads are about ground loops, but this problem confuses me. ok when my pc runs off the ac invertor the power supply wines, which isnt a big deal. and if my speakers (which are run off a 4 channel amp) are plugged into my head unit then they are fine (im removing the head unit and hooking them up to the carpc wen its done). but wen i unplug them from the head unit at the dash i get a really loud whine, without the engine on. the weird part is that the radio doesnt have tot be on. somehow the plugs on the head unit stop the sound, if i only unplug the right then i only get the whine outta the right speakers. it doesnt make any sense to me at all. the rcas are ran on the driver side and the power and ac are run on the passanger. im so lost. help please.