Ive searched a lot before posting here but i couldnt find answers (Actually i did but they didnt work). After trying to change de bios of my xfx 6870 dual fan, so i could unlock voltage, i got the black screen.. I did blind flash, didnt work. I manage to put the 1 priority to the mobo onboard videocard and i could flash again with my backup.rom that ive created. Even then after that i can get no signal from my gpu, fans r at full speed, i got the latest drivers and nothin.. bios already default, drivers updated no response.. Is the gpu dead becouse of a bios flashing attempt? Help!?!?!?! (not native english speaker) Thx a lot.