Question Samsung R530 turns off in stress test

[yossibac]

CPU-Z's CPU stress test turns laptop off instantly. It's Samsung R530
Temperatures on cores are maximum 48 degrees.
Is it CPU or motherboard problem?
I cleaned the laptop and put new paste as well.
Please avise.

 

[yossibac]

OK, Thanks,
I've found a faulty MOFSET and now it's working

https://imgur.com/a/88cWtea

View: https://imgur.com/a/88cWtea


Before I put this laptop back to rest in a storage
Fn key and Ctrl Alt Del combination never worked from new on that laptop, and still don't.
While I'm at it, I'd like to get to the bottom of it, if somebody have an idea.
I am sure it's not a hardware fault, just a driver r software problem, and USB keyboard work just fine.

The model is: Samsung NP-R530-JB02UK

I installed all possible drivers, from HERE:

NP-R530-JB02UK | Samsung Support UK

NP-R530-JB02UK. Solutions & Tips, Download Manual, Contact Us. Samsung Support UK

www.samsung.com

Kind Regards.
Joseph.