I'd check output transistors. They may not be short to cause amp shut down, but possibly went bad.
What is wrong with my Parasound HCA-1000?
Im wondering if anyone can help me troubleshoot my amplifier. I have a parasound ive been using for years and i think one of the inputs is bad. I hook directly into it and the left channel gives sound but has loud popping and the sound is very soft. The right channel works great and the sound is amazing. Now if i switch to bridge mode the sound works great as well. Bridge mode uses the same input as the right channel. My questions are could this be just an input issue or is the one channel shot? Also im looking to sell this amp because i replaced it in my home theater with a denon 4308ci because i wanted to simplify my system. So should i pay to fix it then sell it or should i sell it as is? any insight would be greatly appreciated.