Before 2017 christmas my d3 start to have hw error, i upgrade the software from bitmain i even open a support tiket but no one helped me, and nothing seams to work, i try with another master bord, another power sorce, i even unplug theat board but the hw errors move to the other boards. fortunately after 2 weeks of reserch and a lot of coffe i try the blissz firmeware but no luck, i still have a lot of them on 1 of the 3 bourds, i start to play in the software and i have luck with this configuration. Its working fine in the last 3 weeks. i hope it will be useful for you who got the same problemes. good luck all.
print Sc:
https://imgur.com/p7VWkZMhttps://imgur.com/o2tPanMhttps://imgur.com/jfraj64