I seem to have burned out the power switch on my R2. 1) Stuck in the "ON" position. Will not toggle 2) Turning on the bed heater will often cause it to power off suddenly (black LCD) 3) Wiggling the switch might get it clean enough power to heat the bed for a print 4) After a print, it really wants the power brick to be unplugged to let the thing cool down a while before attempting another print. Right now, I try powering the thing on, and pre-heating the bed. If that works, I can pre-heat the extruder. If that works, I go ahead and start the print, and it usually runs to completion. This obviously isn't a way to run a printer, but I'm a complete klutz with hardware, and if I had my druthers, I'd just hot-wire the switch and use the power plug instead. But, looking into the thing, I can't tell if it's actually part of the arduino board or not. Suggestions?