One minor miner issue: The first one I set up was working fine, but as I restarted the 3 units on the same PSU, that first one didn't have the amber LED at startup. Then I set up wifi, and restarted them again. It took a while for the green/red to start blinking. Now that unit has no front LED indication at all. Tried putting it back on wired ethernet, as well as reflashed the SD card for grins, but no change. Otherwise, it appears to be humming along just fine.

Q: Is there a connector that may have come loose, or could this be a harbinger of things to come for the board?

Thanks!