Just to continue this thread a bit, Vince came by for his superbly self designed and built amp and a few ultrasonically cleaned slabs of vinyl. Naturally, I reconnect the Hafler and power up. The light flickers, then I see a wisp of smoke from the power switch. It's always something. Anyway, I pull it from the rack, take it to the garage, and do a little reading. Apparently the switch is one of the few weak points. I hooked it up downstairs and it powers up fine, no issues. I plan to open it and take a look but think I just need to order a switch from EBay and may not even need to solder, as it looks like there are spade connectors on it. I could use the practice though.