2001 TJ running fine, typical repairs over the years. Had key clicked back today working in the driveway. Went to start and nothing, thought I ran the battery down, but realized 1) it was only on for about 10 min max and also there was no turn over at all, no dash lights, and no radio. Headlights and interior lights work but nothing else. Battery voltage is at 12.1..... tapped the starter with a screwdriver and nothing. also couldn't roll start it either... Any suggestions before i waste any money replacing random parts in a hap hazard kind of way!!