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[Help] Computer won't start up properly O_o

Discussion in 'Tech Support' started by Duality, 11 Jun 2006.

  1. Duality

    Duality What's a Dremel?

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    Hey guys, I'm back again with another problem.

    I have a computer that I sold today but the buyer returned it to me because he said the computer was not working. I checked out everything and everything was hooked up correctly. I remembered though, that the sealed processor that I received had a bent pin on it. This was brand new so I just bent it back into place and installed the processor into the motherboard, along with the heatsink.

    I asked my friend what the problem could be and he said it was most likely the processor, because of the bent pin. I'm worried because I spent $200 on the processor and I don't want to have wasted it.

    Everytime I try to start it up, the light on the fan lights up, then everything shuts off. All of this happens in a split second. The fan on the heatsink doesn't even move, and that worries me the most.

    Any help?
     
  2. RR5

    RR5 What's a Dremel?

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    That sounds like a power supply problem.

    Take a paper clip and insert one end into the GREEN wire and one BLACK wire on the connector you plug into the motherboard. Do this with the power switch on the power supply in the OFF position or just unplug it. Once you have the paper clip on the GREEN wire and the BLACK wire, plug in the power supply or hit the switch.

    If the fan starts to spin and keeps spinning for 10-30 seconds, power supply is good and your CPU or MOTHERBOARD is suspect. Try replacing both with known working good parts.

    Good luck and keep us informed.
     
  3. Duality

    Duality What's a Dremel?

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    I have tried this, but there was no luck. Though, I did try the power supply in another cimputer and it worked fine. When I turn the power supply on, it lights up my motherboard but when I try and turn it on, the light on my fan (the L.E.D) flashes for a split second and just stays off. Heatsink fan doesn't even move.

    Do you think there might be a problem with the converter between the 20 to 24 pin converter I'm using? My motherboard originally needed a 24 pin power supply and I only had a 20 pin powersupply, so I bought a converter. Would that make any difference?
     
  4. kenco_uk

    kenco_uk I unsuccessfully then tried again

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    Try resetting the cmos. Pull the power plug out the back of the PSU, locate the cmos jumper on the motherboard, set it so it's on the middle pin and the other pin, leave it for a bout half a minute, then set it back to how it was. Plug back in and see if it switches on. Don't skimp on unplugging the power from the power supply, if you reset cmos with power coming in (even if the computer itself is not switched on) it can fubar the bios chip.
     
  5. RR5

    RR5 What's a Dremel?

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    Well it works like this. Every newer motherboard pulls about 1 amp of standby current and will have an LED on the board that is lit showing you that it's receiving power.

    Now of course when you remove power from the power supply, that LED will shut off showing you there is no power going to the motherboard.

    With that said, when you press the power button, the CPU will check the power and send a POWER GOOD SIGNAL to the power supply, and it will switch on the motherboard. So, in this case, I would fully recommend swapping the processor first and if nothing changes try the motherboard.

    During my typing of this, I just recalled I had a similar problem when I built a customer a P4 sock 775 system. Press pwr button and things spin, then die.

    The cause was I did not orient the heat sink properly. If the heatsink does not make proper contact, the CPU will not power on the board.
     

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