Question about Intel Motherboard

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Cpu fan wont come on after new power supply put in

I just put a new power supply in ,and cpu fan wont turn on .I checked fan in another comp and it works.My old power supply had a 3pin jumper coming
out of it 1 black 1 white wire it was hooked to SFAN1 the other end has 4 pin hook up on it,Wires are white, tan, yellow ,black, and black with white line. My new power supply wich is a Apevia iceberg does NOT have this wire .Is this my problem .If so how can i fix this ..Please help and thank you...
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  • shemp Feb 27, 2008

    why cant i see my solution..

  • shemp Mar 04, 2008

    Hanto thanks for reply, my mother board is a MSI K9N4 ULTRA .

    As for why i thought the power supply was bad my comp kept on powering of no warning or nothing ,it seemed as everytime I would draw extra power for graphics if this is possible it would just shut down.It for the most part would stay on all the time as long as I didnt Play any games. So I hooked a bigger Graphics card that pulled power from motherboard up to see if it would chang anyting and it shut down immediatly.So being new to this shit i said f:it and got a new power supply.I hooked my cpu fan up to the 3 pin were the old power supply was hooked up to on the mother board and cpu fan came on.I am begining to think the wire from my old power supply that was plugged into this was for some type of variable speed fan for the power supply or something I have never worked on a computer before in my life so sorry if I sound new to this .But my putter still will not boot up

    i think cpu needs to hook up to the cpu pins for mother board to monitoe .I hope this will help sorry it took so long for reply Hanto

    but i saw the solution but i could not open it.I could open everyone else but not mine ?? thanks again hope to hear from you..

×

3 Answers

Hi guys thanks for all the help but i think my problem might be fixed.I was just checking all wires for correct volts . And found one that didnt have correct volts, new power supply and fricked up what the hell.I just ran a jumper and spliced in to it .And what do you know cpu fan works .comp boots and everything seems ok.I turned of comp and am waiting for a reply to see if this is ok to do this.....

Posted on Mar 05, 2008

This is a quick and dirty reponse and not one that I have a chance to research yet, so please take it with a grain of salt. The 4 pin connector that you mentioned earlier was used by Intel processors. The power supply could with this connector supply power directly to the CPU in a more stable, reliable manner by some assumptions. I never really worried about it myself as I used mostly AMD processors and still do every chance I get.
LIke I said this is a quick and dirty, I'll get back to you later today with more details once I see more about your motherboard and what it runs, Intel or AMD.
Every bit of information is important, don't leave me in the dark, okay

Posted on Mar 05, 2008

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What made you change the power supply to begin with? Most cpu fans run off the motherboard, but the motherboard initially gets all voltages from the Power supply to begin wth. Did you assume that because cpu fan wasn't running to begin with, that the original power supply was bad. Not a bad assumption but one that needed verification before changing out a power supply. So it seems at this point that you have an unverified bad power supply, a possible bad motherboard, and a known good cpu fan. Plus at ths point you really don't know of the new power supply is good yet until you see something electrical run with it.

Posted on Feb 27, 2008

  • 1 more comment 
  • Ravel Lively
    Ravel Lively Feb 27, 2008

    It would probably help immensely if we knew what motherboard model and manufacturer you are using. I tend not to trust the subject matter above your question as that has led me astray a few times. Hopefully once we determine your motherboard we can access the company website and get enough information from manuals, etc to come up with some kind of answer.

  • Ravel Lively
    Ravel Lively Mar 05, 2008

    The MSI site below gives some detailed instructions for examining your motherboard/Power Supply issue and it verified as I remembered that the 4 pin connector is only needed with certain Intel processors. Chances are, whoever you bought the Power Supply from got the needed information from you so that they could give you the correct Power Supply for your CPU. The same site will present you with all detailed information plus a damn good layout of the board so you can leisurely compare and study.

    If after reading and examining your motherboard/Power Supply issue you still have not resolved the problem, then come back and let me know in this thread. Okay. Now here is the Manufacturer's website for you motherboard. I purposedly started off in the instructions for the Power Supply but you can find anything MSI makes inside this domain.



    http://www.msicomputer.com/support/sup_t...

  • Ravel Lively
    Ravel Lively Mar 05, 2008

    One more thing before I shut down for the day ( I have a computer issue also with Vista razzing out during boot. Having to do what I'm doing now from Safe mode. I'm beginning to think that Safe mode is the only operational mode in Vista. Anyway I'm seriously considering wiping Vista off the face of ths hard drive and installing XP in its place and I just might do that )

    MSI motherboards used to be slightly famous for leaky capacitors that would short out and either shut down the power supply or kill the Power Supply entirely. I don't know if ths is your issue or not so don't assume that I am telling you that it is, but I did want you to know that in times past, MSI exhibited some faulty capacitors on their motherboards. At one time or another any and all motherboards can exhibit this behavior. Personally I would guess your issue to be something a little less grevious ( I hope )

    Take care buddy. come back when you can, I'll try to be up and waiting, but probably not for the next 16-24 hours depending on my sleep cycle

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