Thanks Philip, I value a lot the time you spent trying to help. I learned alot. It saddens me that one of my S5s lost one board, I will consider sending it to sidehack after holidays.
Id also like to thank everyone else who tried to help. Have a merry christmas and a happy new year.
Sorry, beside messing with cables in case something is loose, its hard to say if there is anything else to try to fix it. The next thing to see, if i missed it, would be to swap the controller to see if the problem follow the blade or the controller. Just to double check its really the blade thats gone bad.
And i also did not see anyone reply for the EVGA G2 1300w. The answer is definitively. You'll lose 1%~ AC/DC conversion efficiency over optimum load however. I'd run two of them at 393hz on one.