So I changed my spark plugs last night and everything went smooth.. I had my dad torque them for me while i put everything back together and the torque wrench hit the positive side of my battery and sparked. I got in my truck this morning and everything was fine except my stereo will not come on. It is getting power because the bottom lights light up and i can eject CD's but the screen its self does not come on nor will it play anything. Its a kenwood DNX7120 Ive had this happen before but it was under warranty and I sent it to kenwood and they fixed it it's now out of warranty and im wondering if it could be something else before I take it to be looked at.