Hello i have a b2r running a avatar 210. When i practice at high volumes the sound just cuts out then comes back again. I usaly turn it off then back on and the sound comes back again. This is becoming a hassle. Today i was playing and felt the back of the head it was realy hot. I think the problem is the fan doesnt work. How can i find if this is the problem and how much would it cost to have it fixed.