Computer wont start up.

[Sam0987]

Hello, recently i opened my computer to clean it all due to it crashing constantly because (i think) it overheating and dust collecting up. After i was finished with cleaning every part i put them all back into the correct places and did not change anything. When everything was in place i turned on the power supply and pressed the button and the computer would not start at all, not even a sign of power.

I did notice a very silent biiiiip which sounded like a fan spinning really fast siliently which i thought was coming from the power supply so i took it out and tryed it with another computer and it worked fine without the sound. Only when i connected it up to my motherboard i start to hear the silent fan-biiip sound. I am still not sure if the sound is coming from the motherboard or the power supply making the sound because of the motherboard. I beleive it can only be the motherboard failing because of something.

I still havent been to my local PC shop to see if they can find an issue that i missed but till then i will try and find some help here.

Please help, and thank you for replying.

Motherboard : Asus P4P800-E Deluxe.
CPU : Intel Pen4, 3.40Ghz
RAM : DDRAM 1GB
Antec power supply.

 

[bmxfreakrider]

hmm. check all of your connections and try agaon. also make sure your processor is seated correctly, check the main power cable to the mobo, and check the p4 connector. o and by the way, did you discharge yourself before you started cleaning? if not, i feel sorry for you, as you may have fried your mobo