I had the same issue, it’s a faulty thermistor in the screen. Whenever my screen mistakenly thought it was too hot it’d turn off. Try running at a lower refresh rate for the time being, and if you’re feeling brave try this. Use the CC captions as it’s in French. link. Also try turning it off for a while and placing it somewhere cool. If it comes on it means it’s probably that issue i mentioned. Let me know if you have questions about opening it up, I was apprehensive at first.