It is interesting to here that on X850PRO (R481 core) has laser cut done (It could be un advantage ). R481 is very similar to R420 ostensibly. Please see that: http://forums.techpowerup.com/showthread.php?t=5367and post your fuses here. After that remove the cooler and connect the left bridge (befor that clean the contact dots with something sharp) using conductive paint/glue or solder a thin wire.
Conduct the fuse research again and post your results. If everything is OK remains only flashing with proper BIOS and flasher .
Successssss
Conduct the fuse research again and post your results. If everything is OK remains only flashing with proper BIOS and flasher .
Successssss