Just managed to get 2 x new back plane and 20 x new hash boards from BA and after a a days work of taking all the heat sinks off the hash boards and then put the two back planes in and managed to make 5 hash boards to test.

The 2 new back planes both don't work, they just turn on and then the fans spin at max RPM.

I tested the 5 other new hash boards I made with one of my other X3's with the back plane it came with and ended up 2 of the 5 hash boards did not work.

Thanks BA.