I was putting a Kenwood unit into a AE90 Sedan today and went to turn it on but nothing happened. I put the old unit back and it didn't work either (checked the fuse and was fien on both units and in the car) but I never put the dash fully back together only just the headunit in (just about the whole dash got ripped out because the unit is next to the gauge cluster) I didn't want to put the whole dash back together and for it still not to work. Any suggestions?