Bad PSU? What is the PSU 4-pin connector?

By bill77094
Nov 9, 2008
  1. Hi, I acquired (for free) a dell Dimension E510 and it it does boot up. When I power it up, it makes a terrible beeping/whining noise and then powers down. The power indicator light starts to blink and I can't power up the computer again unless I hold the power button down for 10 seconds or I unplug the power and then push the power button again. If I disconnect the square 4 pin connector from the mobo, it does not make the beeping sound and the power indicator light stays solidly lit, Regarding the PSU 4 pin connector, I am getting 11.95 volts on each yellow wire (with a volt meter to the chassis) and (minus) - 2 volts on the black wires.
    I have tried removing and replacing the cmos battery, disconnecting the modem card, hard dive. Its only when I unplug the 4-pin connector that the computer does not beep and turn off

    What does the 4 pin connector supply power to?
    Does it sound like the 4 pin connector is good?
    Could the mobo be faulty?

    Thanks, Bill
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,523

    The 4Pin power connector powers the CPU

    But it sounds as though you haven't plugged the power into the Video Card (some 3D Video cards have this, maybe yours?)
  3. bill77094

    bill77094 TS Rookie Topic Starter

    My video is built into the mobo.
    This is not the greatest system, it doesn't even have a cpu fan, just a giant heatsink.
    I'm wondering if the mobo is fried
  4. kimsland

    kimsland Ex-TechSpotter Posts: 14,523

    This can be Ram; PowerSupply; Motherboard you name it.
    The real question is do you want to spend money on it?
    Please throw it away, and buy a $50 dollar working one!
    Or better yet, one that has Xp (minimum) already installed and working on
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