Thanks so much for your offer to help Phil. But before you go to a lot of trouble, maybe I should do one more swap test.

If you remember what I did was swap 0 and 1. So as you look at the the miner from the front (i.e. the air intake side), I went from this:

S0  S1  S2
H0  H1  H2

To this:

S0  S1  S2
H1  H0  H2

This was based on the assumption that the slots are numbered from left to right. If I had any brains at the time, I would have rotated them entirely, moving every hash board like so:

S0  S1  S2
H2  H0  H1

This way all of the boards would have moved a slot and I wouldn't have to know which one is actually S0. If after that S0 is still bad, then clearly it's the data bridge, cable or (yikes) the controller.

Maybe I should still do this just to be on the safe side. At this stage I just have to swap the two outer hash boards to achieve the same effect as rotating.

Since the miner as running at a data center, I won't be able to try this until early this coming week.

In the meantime at least I'm running on two hash boards, which is better than nothing.