Question about Intel Desktop Board D915PGN - Motherboard - ATX - i915P - LGA775 Socket - UDMA100, SATA - HD Audio

2 Answers

Need help wiring Intel Desktop Board D915PGN motherboard

I replaced all parts in computer except drives. This is my first time doing this, and I have everything connected but when press power button nothing comes on. I can see the motherboard has power but when pressing the power but nothing, like nothing happens. I have looked over the quick reference for the motherboard several times and not sure what is wrong. I put all the wires where I think they are supposed to be and wondering if it is the case wiring I am having issues from but even then I put the wires where they show in the quick reference. Of course the reference is not really that great. I mean there some areason the reference where it shows where wires are to go but I don't have those in my case, just what my old motherboard was using. As I mentioned I replace everything, not only the motherboard but processor, heatsink, psu, video card, network card, etc., and nothing responds when push power button, not even the sound of the power coming on. So, ,please help

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  • 3 more comments 
  • carleaf Apr 17, 2009

    I am pretty sure I connected the power supply to motherboard, and no, nothing coming from fans on psu or around cpu. I see a light on motherboard so assume there is pwer going to it, but nothing else shows that there any power other than the motherboard and psu.

  • carleaf Apr 17, 2009

    NitrusInc, I'm very much a novice here so when you say it most commonly a disconnected cpu fan or chassis fan, what do you mean? I think I have the cpu fan connected. The chassis fan is connected I think. I am using the chassis fan that was in the and it is connected directly to psu for power, not through motherboard.

  • carleaf Apr 26, 2009

    NitrusInc, I replaced the power switch, and I heard a little noise coming from the heatsink, or could have been the psu. then a moment later after moving the wires of the cpu fan i was able to push the power switch and the psu and pcu fan came to life. i turned off the computer and tried ushing the power again but then nothing, not in a noise. I am lost, can't think of a thing. I did notice that there were a few marks, like maybe the heatsink had scratch the motherboard a little..the thing is this is a intel board and there is reen light that is on whenever i turn the power on that i believe is to let me know the motherboard is working fine, at least this is my understanding.. still needing help..

  • carleaf Apr 27, 2009

    I have narrowed it down and know that the psu is working. It power another motherboard. Actually it was able to send power through. The LED on the psu power switch was not only on but the LED and fan in the psu as well. While connected to the motherboard that the psu was not powering on in nothing comes on at all.I'm unsing a HEC ZEPHYR 750DR-AT psu. The crazy part is that the motherboard in the pc that was working is old, have had it since 1999, so as far as compatibility issues I don't the psu has one. I've already mentioned the motherboard. I believe the problem is with the motherboard. The processor is a Intel E5200 Wolfdale 2.5GHz, and don't believe it is a issue. I even replaced the power switch. The RAM is O.K. It is like the psu is unable to send power even for it to operate with this motherboard. Again, the psu sent power and was powered when connected to another motherboard. Also, the everything was connected right, even had a friend in IT come over and help make sure everything seated and conneted right. So, just need clarification of what could be, or that my belief is correct in a bad problem with motherboard.

  • Dixit Sardana
    Dixit Sardana May 11, 2010

    Did you connect the power switch cable to the correct pins in the motherboard? When you press the power button, so you hear or feel the fan in SMPS (Power supply unit) and another fan on the processor of the CPU running?

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  • Master
  • 813 Answers

It seems that the power stitch is not properly connected, try to short the PINS on the motherboard to which the power switch is connected or check the manual for the correct power pins on the motherboard.

Posted on Apr 18, 2009

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  • Master
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Here you go. Address this manual for your system board from Intel's site, checking and double checking your connections.

http://download.intel.com/support/motherboards/desktop/sb/c6413602_en.pdf

Most commonly it is a disconnected CPU Fan or Chassis fan.

Let us know if you need more assistance, we shall continue to help you troubleshoot.

Posted on Apr 17, 2009

  • 1 more comment 
  • NitrusInc
    NitrusInc Apr 26, 2009

    That green light is the presence of a particular voltage to the system board, which I believe is 3.3V. I do not know of any system board manufactures creating a diagnostic light for desktop boards. Server boards have diag. lights, but that's a different story.

    There is also concern regarding how much power your PSU is putting out and what exact components you have. Please let us know.

    As far as other connections that could be over-looked. Do you have the P4 4-Pin Molex (2 rows of 2) connector connected to the system-board?

    If the marks on the board are deep scratches (if you can feel an indent with your thumbnail) there may be damage to the board.

    Please try reducing any components that are not necessary during this trial period. These include any Hard-Drives, Optical Drives, Floppy Drives, Perpherial cards (Excluding Video unless you have on-board video)


    The processor may not be fully seated.

    You may need to remove the RAM.

    Unfortunately as you can see the list gets rather sparse in order, and falls on troubleshooting through archaic trial and error.

    There are so many bad things, its hard to say without looking at it.
    Usually systems missing the cpu fan and/or the chassis fan will failure
    to power up, this is why I stated those first. The absence of the P4
    connector can cause damage as well.


    I am concerned about your issue, regardless of my connection to FixYa!. I know how frustrating it can be to have a system that just wont go together, it happens to all of us and anyone that tells you otherwise is a liar.

    The important thing is persistence. You will have to go through that manual until your eyes bleed looking for any tiny connection that may have been over-looked, and only then could we rule out a configuration issue and have to start thinking about defective parts.

    Please keep us updated. Thank you.



  • NitrusInc
    NitrusInc Apr 26, 2009

    http://www.cartft.com/image_db/P4-P4-Ste...

    Picture of the P4 Connector, if needed.


  • NitrusInc
    NitrusInc Apr 28, 2009

    Other than connections or bad parts, I would have to assume that it is a defective system board.

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