Monitor switches itself off again and again after about 30 minutes?

I occasionally play Call of Duty on my Ps4 and have bought a Curved AOC 32 inch monitor for it. The graphics and everything were always very good and I had no problems. However, yesterday I didn't know I wanted to play a little Call of Duty and after a certain time the monitor suddenly switched off. The monitor couldn't be switched on either, it was like pulling the power cord away. If you wait about 30 minutes and try to operate the monitor again, this only works for a short time (about 20-30 minutes) and then the same game comes up again. That the monitor simply turns itself off from nowhere.

Sounds like power supply problems. If possible, have it replaced under warranty.

So the only option is to have the monitor replaced, or could it be repaired?

If the power supply is in the monitor, repairs will be difficult. If external, one can try to exchange this. But I would first ask the dealer about the guarantee, since the same is probably still available (your problem is a defect that is covered by the guarantee / warranty).