Samsung Galaxy Book 3 360 won't sleep when lid closes

[Members_q9r3d72]

I've looked at Samsung Settings and nothing has changed. Same with Windows settings. It seems nothing I can control will put the display to sleep when I close the lid. 

Also, oddly, one day ago, the F2 and F3 keys will no longer dim or brighten the display. 

Finally, there was a cumulative update for Windows on 5/28. 

I don't know what else to do, so any help is really appreciated. 

Thank you, 
Don

[meself]

That would be a power or battery setting forget exact wording but you get idea

[Members_q9r3d72]

That is a fact.

[Members_q9r3d72 · Accepted solution]

Having done nothing but let it sleep for an entire day away from home, the issue appears to be resolved.