Need help fixing my gpu

[rub1v]

I have amd rx vega 56, i install the drivers, no error to see, then reboot, *poof* error 43 comes up in device manager. I have literally tried everything i could find on the internet, from updating the drivers from device manager to reflashing the bios on my gpu. It worked fine the first 3 days, and suddenly, mid game, my gpu drivers just dissapeared from my pc, after that im unable to install them again, i have tried ddu and amd clean uninstaller, nothing works. The last thing i will do is to send it back to the store, because it takes 3 weeks to get a new one... Do you have some magic formula to solve my problem?

[Sat1600]

Did you buy used.  Does it have the original bios 

[rub1v]

19 hours ago, Sat1600 said:

Did you buy used.  Does it have the original bios 

i buyed it new..