P25 VHF Gone?

I've been using my 436 to listen to NYSEG which is a P25 VHF system. It was doing fine, and all of a sudden, today...poof, it's gone. I put it side by side with my Pro 197...Pro 197 chatting away whlie the 436 is silent. I think I read someplace there was another user with a similar problem. Anyone maybe shed some light? Thanks!