earlier today i noticed the power cable was loose to my amp. i picked it up and it slightly tapped the cover of my amp and made a little spark. after putting it back together, my component speakers, amp, and subs are not on. theres no power going to them at all. any ideas of what happened? i dont understand because the power to the amp caused the components to stop working, but the components are hooked up to the headunit. the headunit works fine. someone help please