Lenovo Legion 5 pro black screen problem. please help :(

hi all, I got the Lenovo Legion 5 pro for a year now (since may 2022 on my bday :D ). it haven&been damage or anything too, before the screen went completely black I was playing fallout doing some quest and than the screen decided to turn if self off while everything else was still running. it&really weird, since the day before that it was running fine as usual. I&just abit shock since I paid a good amount of money for it, than this happened. ive been saving it for years to get it and for this to happen within a year of owning it just saddened me :(. I tried everything from restarting to rebooting with a HDMI to another monitor/TV and nothing happen. at some point it did show up on the TV about having trouble shooting so I try to reset and reinstall windows. everything seems to be working, but as soon as the window download get to a percent it just go back to black screen and lost signal. if anyone knows how to fix this please feel free to comment below. Lenovo........why you gotta do this to me :(((((