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.
I tried with the the lowest frequency and 400 mhz and still nothing but I didn't try reflashing the stock firmware, I will give it a try and see what happens. Do you recommend me to use run my machines with those stats when reflashing? Idk how to modify those values from other firmware than Blissz software since the user-friendly interface
BTW, I have other machine with one chain working at 40% of its capacity
https://imgur.com/a/A7KIr