My laptop screen goes black frequently. It started after I switched to windows 11. Why?

[microsoft4]

My laptop screen goes black frequently. I need to restart it to get my screen back on. 

Whenever I am working, screen goes black in between and doesn't wake even after pressing any key or with mouse move. 

If I am watching a video and screen goes off, I am still able to listen to the audio and can control it , but my screen remain black. 
I have changed screen saver settings, but then also screen becomes black suddenly when using. 
Recent changes I have done are only that I switched from windows 10 to 11. I have run all diagnosis check on my laptop but found no issues. I have tried force shut down also but it also didn't worked. 

Please help me with this, I am really frustrated with this issue. 😞

[BeemerBiker]

You may have done some of the following but please look

https://www.thewindowsclub.com/screen-stays-black-after-waking-computer-from-sleep-mode

For now, be sure you have sleep and hibernate disabled for display and system.  After finding the problem (?) they can be selectively enabled.