PC kept shutting off on me. now won't even turn on?

[kidphoenix96]

I have a HP Pavilion 7850. I upgraded it to Windows XP Professional about a week and a half ago. Then starting yesterday night it started to shut down on me all of the sudden. Every time I boot it up it stays on for 3 minutes then it cuts off. Now today it won't even turn on. There's a green light that is on in the back of the PC by the power cord. What's wrong with my PC?

 

[Ste]

Probably a bad power supply, first step is to try another power supply, I would contact HP and find out if you need any special model power supply for that computer.

 

[kidphoenix96]

i tried. they don't have my pc under warranty anymore. do you guys think it might be a motherboard problem?

 

[Ste]

If youve tried another power supply and the problem persists then, yes, the next part to try is the motherboard.

 

[Twizted_3kgt]

Yep, I just had almost the same issue. Except mine would only stay on for a few seconds and then gradually got to the point it wouldn't turn on at all. Turned out to be the motherboard in my case.