Suddenly turns to black screen and system haulted

My MBP A1708, booting is okay, but some times(not the same, but 2~10 minutes) later the screen turns to black and haulted, nothing can be seen and not operating at all.

Sometimes it changes the signal, looks like glitch as attached pictures.

After a few minitues later, it can be reboot.

I’m just checked the voltage for the PP3V42_G3H = 2.42V, it should be 3.42V, is it correct?

Anyway, let me know which part should I check the first?

Thank you for your answer in advance.