New to the forum and just recently back into the Marshall realm after being Marshall-Less for several years. I recently traded for a JCM 800 2203 Reissue and have run into a problem. I the past two times I have played it, it has been fine for a little while then all output cuts. No sound at all. It is getting power just no sound. I have narrowed it down to the effects loop. Since I have unplugged the cables from the jacks it has been running fine. Has anyone heard of this?