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I was finishing up some wiring and I soldered a connection to a layer fan...while the machine was on. I know... Arduino blinked out, power supply fan is still on. Did I fried my rambo board? Feeling v stupid right now.

http://reprap.org/wiki/Rambo_v1.2#Fuses

Most likely all that's wrong is the F3 fuse is blown.

Thank you. That's exactly what it was. Swapped it for f2 to verify. Tested it with impromptu continuity tester. Jeff bezos is hustling to send me some more littlefuses tomorrow. Apparently he's got a bunch of stuff and is real dead set of getting me everything I need asap.