The first thing I would do is the basic troubleshooting if you have not. Swap the ports on the controller, try the bad boards cable into a port where one of the known working boards was. Confirm it still doesnt hash that way. If that is the case your only option really is bitmainwarranty. I know they do a lot of russian repairs and whatnot so I dont think they would have a problem working with an international customer.
Thank you so much man, I'll do that!... Is it often these boards have the same problem? Or It was because of the temperatures or high voltage or may be bad luck?