Looking at it from the front, in the s4, which board is which chain?
One of my original B2 s4's is acting up and finally failed in a manner that kept the controller/GUI accessible. Says that chain 3 is all ----------
Cheers!

Buy APW3-12-1600-B2

https://bitmaintech.com/productDetail.htm?pid=000201505040743496917U7kGsCm0694

Small teaser for the S4 PSU breakout board:



White connector is for the remote switch.

And here are some pics from developpment.

http://imgur.com/a/3G5zL#0

The white plastic sheet was used to simulate thickness and dimensions of a metal sheet for the enclosure.

Dangit now I need bigger LEDs for my stickminer. Gotta stay competitive!

With the small ooooo it's hard to say.  Meech are you able to show a screenshot of status page?

I have seen it before once on one of mine.  I did a reboot and was still there.  Actually went and did a power down of PSU and power back up never saw it again.  On mine it was not effecting hash if its the same. (It's been a while back I think I put firmware on it again, but I'm thinking the PSU down and up was what made it disappear been a while)

Are you loosing hash power as a result? If so it would be your hashboard. resetting your miner should temperately solve the problem I'm not sure if its a capacitor on the board which is going bad but something along those lines. I think it would show an x for a bad chip. i replaced caps on one of my miners hashboards one at a time till the board stopped randomly turning off.

Hey, don't forget about Novak. He doesn't talk much (as this is primarily my project) but he's actually supposed to be the head honcho - though neither of us really like being a "boss". In any case, it's a partnership and neither of us would be doing much of anything if we weren't both in on it. So don't glorify Sidehack and ignore Novak. He's actually got credentials.

Also, I like "GekkoScience - The art of self reliance". That has a good roll to it. I might have to steal it.