Pc turned itself off and won't power up again

[Asdfqwe123]

My pc turned itself off 2 hours ago, it's done this around 3 times before but I've been able to boot it up again previously. This time I can't, I've tried plugging the power into a different socket, switching out the power cable but nothing happens. I think my PSU has died, any way to find out? I've checked other threads for solutions but couldn't find anything to help.

 

[Dustybin]

You can check your PSU separately with minimal load, there are guides on the internet on how to connect the pins to do this.

https://www.youtube.com/watch?v=u0OKmIuNtmI