I was doing some work on a DIY preamp & while trying to isolate some noise I moved my input to the amp, heard some more noise then no sound. I use balanced inputs, which I did wiggle at the connection. Not sure if I shorted something? The lights come so the fuse should be good. I know I will have to swap pieces with its mate to isolate which board is at fault. Just wondering if anyone may have any insight to this problem. Thank you!