Laptop Reboots Or Shuts Off Randomly When Plugged In Or Running On Battery.

In such case I would run a RAM memory diagnostic like MemTest. Any red with MemTest is bad.
https://www.majorgeeks.com/files/details/memtest.html

 

Also this:
https://www.memtest86.com/tech_creating-window.html

 

I ran the RAM tests before - both RAM sticks are ok.

Ref: https://forums.majorgeeks.com/threa...in-or-running-on-battery.323831/#post-2050070

 

This is really starting to sound like a northbridge issue with the system board.

 

Is it a lost cause?

 

Yes.

 

Ok, thanks. It's 8 years old and I got a new laptop 4 months ago. I may just drop the 2014 laptop off at a recycling center. Bye. o/