I have a Pioneer AV receiver which recently went bad. I can hear only the high frequencies from the speakers.
It does not matter which input source I select (tuner, dvd, cd etc.) and it happens on all output channels (front L/R, surround L/R etc.).
Since the problem is common to all inputs and outputs I feel that there is a specific common source of the problem. I have the schematics and would like to try and pinpoint the source of the problem.
I did check the speakers against another system and they were fine.
Any help would be welcome.