Help! My AM section has crapped out!! I was listening to the Dallas Stars game on our local AM station through my NAD T742 Receiver. All of a sudden the program goes silent. At first I thought there was a glitch at the station so I sat for a moment waiting for the signal to be restored. After about 5 minutes I changed stations to listen something else. I discovered that the entire AM section was silent. I switched over to FM and that section was working fine. Everything else on the receiver is working as well. The DVD, CD, VHS sections all check out. I realized that the problem was with my receiver. I tried everything. I changed antennas, I un-plugged the receiver (in hopes that it would reset itself) and nothing has been successful. I now hand the problem to you the AVS Forum faithful to help me out. What has happened? BTW the receiver is three years old.