Strap broke and my guitar dropped. now I am getting white noise on all channels.tried a new cable,and a diffrent guitar. also did the default reset trick(hold amp button ,turn on amp,hold exit/store. no luck. Still white noise. Some channels louder that others but all still have a white noise when there was absolutly no noise berfore my guitar hit the floor.checked all cords and cables,pedal is ok too. not sure how else to porceed. Please advise. thanks