My pc stoped working

[CosmoNeos]

About two months ago I purchased a ryzen 9 3900 for my rig and it worked until a week ago every time I launch a game recently it’ll just shut of and the motherboard light indicates a cpu problem, I’m using a fe 3070 and ryzen 9 3900 with an aio water cooler for the cpu with a 750 wat Corsair power supply 

I really need help I don’t actually know what to do this is my first pc

 

update I have taken and put the cpu back and nothing changed I then swapped cpus with a friend and no change what else could it be

 

[Misguided Penguin]

A simple solution that you can try is taking your CPU out and putting it back in again to see if that solves your problem.