Hello everyone, looking for advice about my Adcom GTP-500 II tuner/preamp. Been having problems with the FM stations going out after awhile of listening. It seems the problem got progressively worse until yesterday - now I can't get an FM station at all. I don't listen to radio much so it hasn't been a huge deal but I think I would like to get it fixed. The AM reception is fine by the way. I am going to look for a repair shop near me but would appreciate any comments.

Questions:
Any technically inclined people out there have an idea of what the problem could be?
Any estimate on repair $?
Is this unit even worth spending the money on or should I consider just replacing it?
Any recommendations for quality repair shops in the Chicago area?

Thanks alot, been reading every thread possible and learning a great deal.