ComputerBB

Hello,I have windows XP and when I turned it on the other day...nothing.
It wont startup at all.I changed the HD and still nothing.The cpu fan runs but the monitor shows no activity.I can hear the HD spin,but thats it...anyone ever had this happen?Someone said that it was the power supply..but just wanted to ask some experts. I have a HP Pavillion xt933.Thanks for any help...

Make sure your monitor is properly connected and that your video card is firmly in the PCI slot

It does sound like the PSU, if you have any generic psus that work try them out in the computer, if that fixes the problem then you will most likely have to buy a micro atx psu.

Ok... I looked at it again when I got home,When I turn it on..no beeps at all activity light is green for a few seconds then goes out.I looked at the power supply and the fan wasnt running,so I figured that was the prob.I took one out of another machine(old One)and tried that...still the same thing..no beeps or anything.So I took the original supply and put it in the old computer..started up..fan ran...and sounded like it went through all steps(i didnt have anything hooked up to it). So....any sugestions??
Thanks..
Tony