So I picked up an 06lc and at first I had external system not connected error. Replaced the fuse on the passenger footwell and that fixed my backup cam, nav and radio but there was no audio. Looking in the bay the 30a fuse was missing altogether. Replaced it and it immediately pops. Looked under the seat and the amp seems to look okay with no visible damage. I even took the amp apart and cold not find any burnt circuits or obvious issues. No signs of pinched wires or shorting out anywhere. I know it's hard, but any ideas?