I have a Kenwood's KDC-MP345U in my jeep wrangler. I was reinstalling one of my Rockford Fosgates and my dash fell. That caused the light in my tach to go out. I screwed around with is for a couple of hours and fixed it. I noticed my head unit was still fine but once I bolted everything together it wouldn't turn on. So, I broke everything back down. I thought I might have pulled a wire or something but I'm getting 12.75 volts from my power supply. Anything else I can check?