Hi,
Yesterday, on my X10, one of the blue LEDs went out, but the miner still hashes at the correct speed. I restarted, reset the pi and controller, and tried different SD card with no effect. Today, I spent a few hours online, looking for a reason/solution, but couldn't find any. When I went back to the miner, I found another blue LED has gone out (still hashing correctly). What could be causing this?
I encountered same problem few weeks ago. Sometimes one blue led light is gone, sometimes two, but never saw that all 3 were gone. Sometimes all 3 are shining

As longs as there is no diff in hashrate and chips are working as always I don't pay attention to it anymore.