I have 4 cubes, was running only 2 while waiting for a 2nd PSU. Got the second PSU (Corsair RM850) and plugged it all in, everything starts up and runs ca

This is the output, all are running on a BFGminer proxy, have swapped power supplies, network cables, split the cube and reseated/tightened up all the blades... just this one cube is behaving this way

Anyone else seen this happen or heard of this happening

Thanks all