MacBook Pro 15" mid 2014 suddenly shuts down
So, my MacBook Pro has had this issue for a good while. I just picked it up again after 4 months of collecting dust, to see if its possible to fix it.
We´ve tried changing the heatsink without results. Or at least positive results.
I can be surfing in safari or playing CIV V which is the hardest thing this machine has ever done - and it suddenly shuts down without warning. I tried stresstesting it today both CPU and RAM and nothing happened, until the stresstest was finished, then it shut down. And then i can start the MacBook again, and it shuts down after a minute, or it can take an hour.
I´m kinda lost here, all help or propositions will be appreciated.
It is a 2.5GHz with 16GB and 256GB SSD
Is this a good question?