Anytime I run a slightly more demanding game on this PC (Overwatch 2, Anno 1800), it turns off. Fans still spinning, but screen dark. If I play less demanding games (Snake Farm, Fear & Hunger) its all peachy.
I'm genuinely exhausted of making trips back and forth to the tech and troubleshooting online, so I'll just adopt the doctor's response to this problem ("It hurts when I turn my neck this way" "Then don't turn your neck that way"), stop trying and accept my losses.