Why does the system restart when playing with an external monitor?

Question

laptops

Good afternoon. We have an ASUS F570ZD laptop with an Nvidia Geforce GTX1050 graphics card.
When playing (Fallout, Diablo) on the native monitor, everything is fine.
When an external monitor is connected via HDMI, after 2-3 minutes of the game, the laptop is cut off (it does not reboot, but simply falls asleep so that when you press the mouse buttons, the login window appears).
Drivers for the video card are fresh, there is no noise during operation.
Where to look?

Answer 1

Check your windows power settings
Disable sleep mode

Answer 2

Hmm, I ran Diablo in windowed mode - no crashes or sleeps...