I'm starting to have problems with my 3+ year old HK avr-75. I use stereo mode while watching TV or listening to music. About a week ago I started hearing static and popping sounds and then stereo mode just stopped working. All of the wiring seems to be as it should but no more stereo. I switched to hall mode for the television but that one just went out too. I still have a few DSP modes left and 5.1 hasn't been effected yet. Is it possible I'm missing something here or is it normal for a receiver to die out one function at at time?