hi all, i have had my Gallien Krueger 400rb III (2x10 combo amp) for a few years with no problems whatsoever. i mainly use it as a practice amp and haven't really gigged that much with it. a few days ago while i was praciticing it just went all quiet. i mean, i could still hear a little bit of sound coming from the speakers, but really really quiet, more like a buzz. at first i thought the battery was gone in my bass, but i checked it - all good, and also checked it with my spare bass. then i turned the volume to full on my amp (which i never do, way too loud!) touched the strings and the amp went BANG. i turned the volume back down and my amp was working again fine it has since happened a few times again, totally randomly, and i have *fixed* it both times by cranking the volume until it 'pops'. i'm hoping it's an easy fix. i really can't afford big repairs at the moment does anybody know what this is/had this problem before? any help would be greatly appreciated, cheers, andy.