that sounds like its almost identical to the problem i had (well one of them anyway) and i literally mean what i say on the cables, i didnt get new ones just changed how they are connected. unscrew the bolt that holds in the 12v (green and yellow wire) remember which terminal it came off, now unscrew the bolt for the black GND wire, bolt the black GND cable to the terminal you took the 12V green and yellow cable off, likewise bolt the 12V to the terminal the GND cable came off, do this only at one end (either on the power board or on the main goldstrike board) hopefully it should now power up. why this works i dont know, but it seems to