EDIT - See post #11 for today's question... Is this a house wiring problem? Is the electrical outlet not grounded? If that's not it, then what is it? And what do I do about it? I have an older Trace Elliot AH250 amp that I really like. It's only down fall is that it seems to be "picky" about it’s power. When I plug it in to certain wall outlets, a red LED flashes and I get a repeating "click" sound through the speakers. I'm not sure exactly what the LED really indicates (I've looked every where for info - if you have a manual please PM me!) …anyway, I think it's labeled "ECI" or something like that? (sorry, I'd have to check that to be sure) I do know that this light is not part of normal operations, and only comes on when the amp doesn't like the wall outlet it's plugged into. This has only happened twice, both time in basements of old houses. I need to get a handle on what is really going on here, as it kind of plays into my next question - what to do about it? I have used other amps that seemed to work fine in the outlets this one has trouble with. My guitar player has his giant Mesa triple rectifier plugged into power that my Trace doesn't like. Is the issue with the amp? Are some amps more "picky" about their power? My band wants to start playing out soon. I took this amp to use in the jam space for the first time last night, and had the problem I described above. I took care of it by finding an extension cord and plugging into an outlet that worked right. My guitar player asked "What are you going to do when it happens on a gig?" I told him that was a good question, and I'd sort out some sort of answer.. So.. What should I carry on a gig in case this happens? A lot of extension cords? A different amp head as a back up, hopefully one that works normally on outlets that the Trace "doesn't like". Does my amp need some sort of service? Sorry for the long read. Any info is greatly appreciated.