Fan lights flickering hooked to motherboard

Forum Systems : New Build Fan lights flickering hooked to motherboard

OK so i had this old gateway computer that i took all the parts out of and put inside my extra 912 cooler master case for fun the the gateway case has little fans like 60mm or somthing there tiny. anyways my 912 has 120 led fans i hooked to of them up into the mother boards 3pin slots but then i turn the comp on the fans flicker like there not getting a steady flow of electricity. Also the computer does seem to be working ok from what i can tell. when i moved it into the new case i replaced a few things i put a 5770 vid card in it and had to use my ax750 corsair psu.

the motherboard is a intel DG965OT

Does anyone know what my problem could be?

Reply to daman

Also wanted to add when i plug the power into the computer the computer comes on for about 2 seconds without me pushing the power button, then it stays off until i press the power button to turn it on. I just now threw a new hard drive in it and installing windows 7 onto it.

Reply to daman

Sounds like either a power cable is not fully plugged in, or perhaps the motherboard is not properly fitted in the case. Improperly aligned motherboards can cause anything from an outright short which will not let the computer start, to an intermittent problem like you describe.

The best way to test this, which is also a good idea before stuffing everything into a case anyway, is to breadboard the build. This means hooking everything up and running it outside the case. You can set the motherboard on the top of the box that it came in, and lay the power supply on a table beside it. If the PSU has a bottom fan as most do these days, lay it so the fan faces up.

The advantage of this is that if everything works outside the case, and not in the case, you know exactly where the problem lies. Otherwise, you could spend hours chasing transient electrical issues.

If the fan still does not work properly after all this, I would suggest a cheap adapter so you can hook it up directly to the PSU. Not a bad thing to have anyway to test fans before screwing them into a case. http://www.newegg.com/Product/Prod [...] 6812201009

Message quoted 1 times

------------------------------ The power supply is the most important component in any computer. Without a good quality one, you usually wind up with a really expensive door stop.
Reply to tlmck

tlmck wrote :

I have already hooked all the fans up to the psu and i have installed windows onto a new hardrive and computer is working just fine. I was just worried about the motherboard since the fans were flickering when i had them hooked up to the motherboard.

Reply to daman

And the 2 second startup/shutdown this is fixed also?

If so you may have just has a bad mobo fan connector and a temp glitch on the other. It happens.

------------------------------ The power supply is the most important component in any computer. Without a good quality one, you usually wind up with a really expensive door stop.
Reply to tlmck

start by paperclipping the PSU. If it works like that then it is one of the things tlmck suggests. Make sure your video card has the power cable attached. good luck

you need to go into your mobo settings and make sure the temp monitoring is off for those fans or else they wont get a steady voltage which they need to stay fully lit up. good luck

Reply to deadlee690