After 2 weeks of sitting in my garage while I was out of town, the 94 E320 won't turn over. Interstate battery is less than one month old, and shows 12.71 volts across the terminals. Indy also replaced the neutral safety switch and shift bushings when the battery was relaced. No problem before the trip. The horn and headlights work, and I think I hear the starter solenoid click. Any thoughts?

Mark