my zx400.1 amp froze in my car somehow so i brought it inside to "thaw" it and after that i hooked it back up in my car and it worked fine. but now i just switched subs went from 2 10" cvr's to 1 L7 and now i cant get my L7 to tune in with the music. i also switched back again to see if the sub was the problem but the cvr's wont tune in either. i cant figure out what the problem may be. i checked rca's and power cords. im thinking my amp may have gotten water damaged since it was lightly frozen in my car. and i seriously have no idea how that happend. so what do you think the problem could be?