Maybe adjusting frequency may help you with your hardware issue. Just like in antminer s9
Try to change the frequency to lower and test if anything changes.
And did you try to use the stock firmware which you can download directly from bitmain?
try to reflash it again with this firmware https://shop.bitmain.com/support.htm?pid=00720170915192851224mJ36J1ap066E
just repeat 2 times if it didn't work try again.
if you just tried it once, you will never know if your D3 is a hardware or software problem.