Before I trash this thing, figured I ask if anyone has hear of this.

I have a Yamaha HTR-5150 receiver. Worked fine for a long time.

A few days ago, sound quality degraded. I ran one of the THX tests on
a dvd, and realized that the rear channels were coming out the front
speakers. This was not the case before, and explains the crappy
quality and echo that has developed...

Any suggestions?

dave