I also lost my LF and LR channels this week. I've had my receiver now since '02 and never a problem before. Can someone tell me what's causing the loss of audio? I too have tried different sources and nothing fixes the problem. I did notice, however, that the Power-on relay clicked prior to losing audio. In fact, the click heard when you first power up the system was clicking radomly when the receiver was already powered up (this has been happening for months but I thought it was my TV set). I'm interested in knowing what other's have found once they took their 1050's in for repairs. Thanks