So I have 6, upgraded 2, and they went down, never came back up, they are running. Not connected to my pool, and not reachable from myminer.io

Has anyone else done the suggested upgrade?

Sadly I'm on my way to work, GRR so I'll be offline on two miners for ten hours!

Suggestions on what to try/do when I get home?

Power never cycled, and they did the reboot countdown properly.