What is preventing my computer from starting?

I just bought a new motherboard and and Intel Pentium 4 Processor. (They are both compatible) The processor is 1.6 GHz. I installed them into the case of a pretty old computer, and used that old computer's power supply and fan. I plugged all of the needed cables into the right sockets on the motherboard. (The old fan's cord couldn't reach the System Fan connector, so I plugged it into the Power Fan connector. Is that a big deal?) When I pressed the button on the front of the computer, nothing. I unplugged the powercord from the back, and I heard this high-pitched squealing that took about 20-30 seconds to completely stop. Would the old power supply be the reason for this? Thanks.

What is preventing my computer from starting?
Sounds like you just fried your new processor chip! Stick to building sandwiches until you have a little more experience! Next time read the manual! Either the fan wasnt the correct one or you didnt apply heat sink compound! That hi pitched sound you heard was the processor goin into nuclear meltdown! If you think I am kiddin, take the fan off and you will see the center of the chip has completely blown away!
Reply:I think your computer is not working is because you istalled that thiong into an old computer case, and don't use that case get another one.
Reply:It sounds like the RAM is not compatible.
Reply:buy an other psu cuz p4 mobo need least 300 w power.


have you got if not then don't play with it coz i fuked a mobo by using low power psu with p4 mobo
Reply:was that power supply within specs for that mobo. i don't know if i would have connected the fan into the power fan either....





all i know is that CPU's aren't supposed to make "high pitched squealing "sounds.


i kind of wonder, did you happen to smell an acrid smell after you fired it up ? if so you may well have fried your mobo...........
Reply:Most likely yes! Intel Pentium 4 Processor power supply is different from the old AT style case. If you look at the actual old power supply plug it is much shorter that the one required on the motherboard. You probably need a newer style case and power supply to accomodate the new motherboard and Intel Pentium 4 Processor. You mentioned the he old fan's cord couldn't reach the System Fan connector, which indicates a possible mismatch on the case. ATX cases power supply are turned 45 degrees for this reason(by Design) It won't power because there isn't enough power for the CPU. when you go to purchase a new case tell them which Motherboard and CPU combo you have.
Reply:Old and New do not mix to well at times. I would suggest using an ATX psu and a ATX system case. They have to match in power. I wouldn't use the power supply any more til you get a better power supply and system case before the Da.m thing goes to hell.
Reply:You probably should have purchased a new case/power supply with the new mobo/cpu but that doesn't answer your question.





If this is a new install, and its never run before then perhaps you neglected to check your jumper settings. You may have to set your bios jumper to normal instead of clear. Sometimes motherboard come with the bios jumper set to clear and has to be set to normal to boot up. Check your motherboard manual.
Reply:i don't think you should connect the cpu fan to the power fan connector. try getting another fan (maybe the cable will be longer) or else, get an extension for that cpu fan, but it's possible that you busted your new cpu





check all your jumper settings...and also, consider getting a new power supply