Hmm, that doesn't look good.

Have you tried pulling the cable from the one you think is the bad board?

From memory, my bad chip is in the low 1/3rd so when the light is out on the left board at least my 2 other boards can mine.

If you disconnect the leftmost board (when the A5 is powered off) then does it at least mine on the other 2?

Have you tried re-flashing via microSD card? (I found the download link for this a bit temperamental but got it downloaded in the end and used Win32diskmanager to write it to my microSD card).

Cheers,

FB