How to diagnose the problem of acer aspire 3 laptop with the screen turning off (the backlight is working) and then rebooting?

Question

Acer

Notebook acer aspire a315-41. Suddenly, during operation, the monitor first turns off - it just turns black, and then after a couple of minutes the laptop reboots itself and then everything works fine until the next such reboot. The laptop is new, windows 10 is original, the firewood is from the website of the laptop manufacturer. How can the problem be diagnosed? Windows does not show any messages about a sudden shutdown after rebooting