Help My PC wont start up! [Noob]

[hen555]

Im not very good at the technical stuff about computers but i do know some.
I took cisco ccna 1 and 2.

I pushed the button and nothing happens.
I checked the power chord in the back and theres a green light that is lit when it is plugged in. When its plugged in , I hear a high frequency noise and whn i take the plug out, after a few seconds the frequency noise gets higher and higher like somthings ganna explode but its not that loud. when it reaches the peak the green light turns off and thats that.

Im thinking and hoping its my powersupply because it wud be harder to replace the mother board .

so what are sometests i can do to check if its my powersupply or mb and how do i fix it which one do i buy.. im a noob lol

[CMetaphor]

Sounds like a dead power supply. Probably a leaking/squealing capacitor (that may Pop btw, don't stick your face near it when it's on). I'd suggest replacing it ASAP and not trying to turn it on anymore, you could damage your system if the power supply is supplying the wrong voltages to the motherboard/components.

[dataxpert]

As suggest by Cmethaphor the PSU may be damage all true I see it on system with short and the PSU was ok . So better make the test with a new PSU ....... it's the choke in your PSU that make that noise. it's normal it continue after you unplug ,, the time the cap discharge, I think they have a 10 point to check list some place on this forum, I will let someone who know that list post it to you , but first unplug everything attach to your PSU , except the MB and the Video card ( if plug to the PSU ) and remove all card execpt video card. and check if the system post on ( this means you will see at least some carater on the screen, of course no Windows since the HD will be unplug.

If you try it with your old PSU , make sure to not make it run too long, in case of problem.

[dataxpert]

I have a quick test for test the PSU, but I'm affraid you will mess it.

[hen555]

i dont have a spare psu to try out lol
and do i discconect the soundcard, and even the cpu?

[dataxpert]

Why I have suddenly the feeling than i don't know where to start anymore.....

Originally Posted by hen555

i dont have a spare psu to try out lol
and do i discconect the soundcard, and even the cpu?

[hen555]

dammet

i heard theres a paperclip method to test if the powersupply is really gone
or if its the mb

do u know of it?

[dataxpert]

Can you explain me how come you ask me if you have to disconect the CPu, and you know about the paper clip ......

[hen555]

my bad i read it wrong, i thought u wrote take everything out of the mb.
but im not that bad on the computers
im like in the middle, i know a little about troubleshooting, like the layers and stuf they thaught me in cisco

but ya so paperclip?

[stoanee]

Here is a starting point....