KLH R7000 Repair

[claymca]

I am new to the board and I need some help. I have an older mid range KLH R7000. No where nesr top of the line. I just need some insight as to what could be the problem. One day I was watching a movie and everything was fine when a loud pop from the KLH came out of nowhere. After that no sound. Powers on goes through all of the modes but no sound. I don't even get sound from the headphone jack, you hear it click when you insert headphones but no sound.

I did notice when I send test tones it flashes the left front speaker and stops there, it does not cycle through the rest of the speakers.

I found where someone suggested replacing two certain Audio Driver Transistors but I cannot find a schematic any where. I don't believe it will be worth the money to have someone repair it the the parts are fairly cheap. Any help would be great.