How likely is it that my GPU is beyond repair?
I have a Vega 64 reference card that I installed a Byskski water block to for my first water cooled system and everything went fine to begin with. I had the system up and running for about 2 weeks with everything working just fine, temps were good. I decided i wanted to rearrange my loop, largely for aesthetics but also for better access, draining etc.
When i did this i also removed the block from GPU in order to clean it out as i could see some debris in it (it was acetal from the threads on my EK pump/res combo). I reassembled the block and pressure tested it to make sure it was air tight and it was. I reassembled my loop, pressure tested it and then leak tested for 12 hours just to be sure. There were no leaks and everything seemed fine.
When i tried to boot the system for the first time i was getting no display at all - i tried with different monitors, DP cable, HDMI cable, different power supply - nothing. So once again i drained the loop, removed the graphics card, removed the block, reattached the stock air cooler and then tried again to boot (in a different system).
I still got no display, the fan would not spin but the 'Radion' logo on the cooler DOES light up. I have no idea what i could have done to kill the card but since the logo does light up it's clearly getting some power. I appreciate this is a hard question to answer but if i send it off to a company that repairs GPUs what do you think my chances are of it being fixed?