I recently bought a barely used mg102cfx. I had been using the line out with headphones, it was kinda quiet, which was weird, but I let it go. I decided to try and get loud since I had a day home alone and.... nothing. Is this a common issue? I tried different cords, ran a single input with no fx chain, etc. and I couldn't get any sound out of it at all. Any advice? Can it be fixed?