I'm experiencing the same problem with my Asus Radeon R9 270 Direct CU II that's been discussed here many times in the last few months. To make it short: Screen goes black during driver install and remains black until de-installing the driver in safe mode. It's been discussed in more detail in any of these threads:
… and many more.
To summarize: All troubleshooting and customer support couldn't get to the root of the problem and at this point it's most certainly a hardware problem. I don't think we have to go over it all again, my only question is this: Did anyone do what's been suggested here and took their card to a repair shop? Any luck?