Starcraft 2 not working properly on LG C2 42

Everytime I start the game, the screen goes blank and says no signal. I can hear the game menu though so that means it’s running. This is the only game that’s doing this so far. I’ve played 50+ different games from 2003 to the most recent, none shown this problem. Every driver even the tv’s software is the latest.

Could be the computer try to force a too high resolution/refresh rate combination on the screen.
Try reducing those values, even if you have to go as far as 1280x720 and 50Hz, and when you find something working, try to crawl up the values.

tinkerin around with the refresh rate and resolution didn’t work. unplugging the hdmi cable from the gpu and plugging it back did work. plugging it into the other hdmi slot might also help just in case anyone else encounter the same issue. also don’t forget to change the resolution to 4k in the in-game settings. it was in 1080p when i checked it, could be what’s causing the problem.