G5 keeps turning off for a few seconds when connected to PC

As the title says, for the past few days I’ve noticed that at random my TV would just turn off, the red light would start blinking then show the webOS logo and go to home again, it’s happened twice now while playing re4 remake. The first time I couldn’t get back into the game because when I switched inputs, even though the sound was working through my headphones the screen was completely black, whereas this time I was able to get back into the game. Does anyone have any idea on why it could be happening