Desktop boots blank -- Gateway doesn't even come up for five minutes

[trithumb]

So I press the power button on my desktop. Powers up fans kick on and run high on processor and Video card for about 5 minutes. The power button does not light. After about 5 minutes the power button lights shows the gateway splash screen and then boots into windows. if you leave the computer run for a while (few hours) and you shut it down and boot it back up its fine. If you leave it off over night it shows the symptoms explained above.

 

[Tmagic650]

Replace the power supply...

 

[trithumb]

Yea? why would a bad PSU make it not boot right away.

 

[Tmagic650]

It could be a motherboard issue too. Power supply issues can cause all sorts of trouble, and they're easier and cheaper to replace than a motherboard. What is the model number of this Gateway computer?

 

[trithumb]

Yea I will probably run to best buy and rent a tester power supply. If it doesnt work ill prob just scrap it. Its my parents old desktop that they rarely use. Its older I dont recall what it is exactly.

 

[Tmagic650]

If you can, take a look at the capacitors on the motherboard near the CPU heat-sink. They may look like this:
https://www.google.com/search?q=bad...PeqXyAGI74G4CA&ved=0CFwQsAQ&biw=1920&bih=1113

Then you can scrap it

 

[trithumb]

Yea thas the first thing I checked for was blown caps. I pulled the video card and went back to on board graphics thinking it was something with the old AGP card in it... Then I realized it wasnt even doing the gateway splash screen or anything...