I have an S17+ that will power up and all fans work on both the PSU and the miner. It will get me to the antminer interface. No hash boards show up at all. When I measure the voltage at the buss bars that connect to the PSU and the hash boards, I get no voltage. I tried another controller and get the same thing, no voltage between the two big buss bars. Shouldn't I be getting 14-21V at those bars?