ruffino148 wrote:
Turning-off-display-after setting Never position the Battery and Power adapter,
If I turn off and then turn it on again or restart it, the Never position is set to 15 minutes.
I tried OS update and NVRAM/PRAM, it was not solution.
Ok— if this is Intel Mac then try resetting the SMC How to reset the SMC of your Mac - Apple Support
To trouble shoot further you can:
—SafeBoot How to use safe mode on your Mac - Apple Support
Takes a bit longer to get to the login screen, does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.
Login and test. Reboot as normal and test. Caches get rebuilt automatically.