Razer Blade 14 & 16 (2025) - Won't sleep when lid is closed

Neither of my Razer Blade 14 & 16 (2025) will sleep with the lid closed. Does anyone have a solution?

As I understand Windows modern standby is easy to stop sleeping. This doesn’t happen anywhere near as bad on our other Windows laptops

I suggest trying to run a sleep study and see if there is anything interesting in the report it generates.

In an Administrator cmd:
powercfg /sleepstudy

Very good idea! Thank you for that