I recently bought the voodoo lab pedal power 2+ and hooked it up to my pedal board. I misread the instructions for the power block and reversed the polarity to the dl4. It worked for a day or two then went dead. I'm pretty good with electronics and soldering but have no idea where to start looking, nothing visably fried. What is the most likely thing to have happened to it, or how could i find out and possibly fix it? I use that thing all the time for loops and the reverse delay and cant afford a new one.