I am currently having random crashes on my laptop. It sometimes happens when I am working, or away from the computer.

I have verified the RAM with memtest already.

The screen will freeze, the touchpad will not work, and I cannot switch to the TTYs.

This particular laptop (annoyingly) doesnt have a caps lock light, so I cannot even tell if the laptop is having a kernel panic or whatever.

What would be the best way to diagnose such an issue?