There is a recall on the G10 return it , go to line6com , it is a fire hazard , mine did the same thing got a new one in the mail yesterday , there is also a update to install from your computer , mine didn't work , so I got the new one
I have a Spider 3 , 75 watt , when the guitar is plugged in has a high pitch squeal ,cant hear any guitar , I could plug in just a jack , hooked to nothing and its the same thing Any Ideas ?? Thanks