My Line 6 120w amp was working fine until one day I found the white/ black speaker cables not connected. I connected them again and checked if my amp was ok. I turn it on and no sound. All of the LED's, lights, and even presets work fine but just no sound! I need to fix my amp urgently and if I can save a few bucks for repair that'd be awesome! I've tried reseting it, and plugging the headphones(which I hear my signal with headphones in).Has anybody gone through this before or know how to fix it? Please help.