HP Pavilion 22xi switches off constantly (after 5-10 min)?

Link to the monitor:
https://www.amazon.de/...B00AHUNNWA

I own this monitor for PC and PS4, it always switches off after 5-10 minutes. I checked the cables, it's not the cables. What should I do?

So far he has been running unobtrusively? No energy saving settings changed? Is it as old as it is (> 6 years old?) → sounds like a slowly dying power supply to me. Not much will be possible anymore, maybe a repair if you want to afford it.