Thanks Phil. That's very helpful info.

Looks like I have the same problem as you.

I swapped the SM0 and SM1 hash boards. While I was in there I added a couple of thin nylon washers under the bridge on the chance that it might prevent a short.

When I brought the miner up, the problem stayed with the SM0 slot.

Since the problem is following the slot, not the hash board, I think I have a bad bridge.

Seems like this is a common problem. They should consider reworking their data connection design. What was wrong with cables, after all?

Other than this bridge problem, the build quality seems really nice. I was impressed, especially with those beefy power bus connections.

Looks like I need to ask pangolinminer.com support for a replacement bridge. Better than a hash board, I guess.