7180 help.

I recently installed a 7180 with remote head into my truck. The remote head was new but the radio was used. I haven't had any problems with it until today when it beeped at me 3 or 4 times and then shut off and now won't power on.



I have checked the fuses coming from the battery and they are good. I have also checked the ribbon connections at both the radio head and the main radio part.



What else should I check?

7180 help.