Hi Mark, my amp doesn't have phantom power, so there must be battery power, but I can't see how the battery is accessed. Maybe the battery leaked and glued the thing shut.
I seem to have a memory of changing the battery years ago. I unscrewed every screw and the windscreen end. I know there's a battery in there because I measure about 200mV DC (as from a dead battery) going into the switch circuit board.
Thank you very much,
John
Ahh... Just read the link you provided. Yes, it must be glued shut from a leaky battery. Hope I can salvage this thing. Thanks again.