Thanks for your answer. It has a Intel UHD Graphics 620 GPU.

Thank you very much for your answer.

Ok thanks, I’ll try it too

I’ll try also Memtest, thanks!

It turns off suddenly. I’ll check these tests with Lenovo, thanks

Thank you very much for your help!

Thanks for your answer. It happens randomly: I use this laptop only for searching on Internet and write docs in LibreOffice. I’ll try to clean vents and fans and if that doesn’t work I’ll try with the thermal paste

Thanks, I’ll check that.