What's going on I was scrolling through presets playing along. Everything sounded great. I've checked the bypass buttons etc. Searched on here. The bypass button is flashing off and on when I push it once and when I push it the other time it blinks with the tempo button (I think it's just the tempo light coming through) I'm a total noob. Like I said 5 mins sounding great and now nothing. What did I do thanks