Time to replace PSU?

[greatfool66]

I'm working on a HP Pavillion a1140n desktop. Two days ago it would power on but no video (led's, fans, hd's spinning ect), just no signal to the monitor. There is no graphics card, just integrated.

Today the video worked and it booted all the way into windows successfully but none of the USB ports worked so the USB mouse and keyboard didn't work for a while. 3rd time everything appeared to work correctly.

Is this most likely a PSU or mobo problem? I'm thinking PSU because its intermittent, could a mobo break, then later work again? I can't see how. Thanks for advice.

 

[Mide]

You're on the right track. It's prob the mobo since you mentioned the USB ports not working. Either way your HP is proprietary so it might be hard to swap in/out new parts.

 

[greatfool66]

Ok. So you're saying that even the PSU is proprietary? I tried swapping for another one and the system wouldn't even power on, which I found odd.