I'm pretty shure it is the PSU just want your oppinion on what else it could be. The problem is that the computer won't start and when you look on the back of the PSU, you can see the green led wich usually just lights up when it's connected to the wall socket but now it's kind of pulsing/flashing when you connect it. Could it be something else? Any help is as always appreciated.
I bought a new 420W PSU today and installed it and everything works, and no nothing happened before when you tried to start it.