P6DGH mobo + SC750-S power supply and board FRIED!!!!!!!!!

Discussion in 'Supermicro' started by Aaron Erimez, Jan 18, 2004.

  1. Aaron Erimez

    Aaron Erimez Guest

    Came home last night and noticed that my apartment smelled like
    burning plastic. Turns out that unsavory odor was emanating from my
    PC, which I'd left on that day and which was now completely locked up
    with a blank screen.

    Cracked it open and saw that the power connectors to the motherboard
    were charred - specifically, the two left wires (red & orange) and the
    three right wires (all red). God knows if any of my components
    survived, but my question right now is:

    Any idea what caused this?
    Aaron Erimez, Jan 18, 2004
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  2. Haven't seen this on my P6DGH's, but did see this on a SM Pentium Pro
    board caused by different metals on the power supply contacts and the
    motherboard contacts - get corrosion, eventual failure. In my case
    removing the power supply connector on the MB and soldering in a
    replacement (extensions with AT power connectors are easily available,
    think that this is also true for ATX) and the board came up.

    The problem is electrolytic corrosion caused by moisture between two
    dissimilar metals. I was told some time ago that SM made power cable
    externders with gold contacts on one end and tin on the other, but
    I've never enquired.

    Mike Squires
    Michael Squires, Jan 18, 2004
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  3. Aaron Erimez

    Aaron Erimez Guest

    You were absolutely right, Mike! I repared the connectors from the
    power supply and got the motherboard connector from an old AT board.
    After a little soldering work, everything seems to work fine! I was
    really worried that the system was a total loss, and I can hardly
    believe that after all that damage and re-work everything is fine. So
    thanks again!

    Aaron Erimez, Jan 23, 2004
  4. Aaron Erimez

    Aaron Erimez Guest

    Follow-up: Now that everything is reassembled, it seems that the CPU
    temps are higher than they were before. According to the BIOS, the
    idle CPU temps are about 50 degrees C. Is this an issue?
    Aaron Erimez, Jan 23, 2004
  5. Rather funny - my daughter's P6DGH died this weekend with the same

    Whether or not CPU temps are currently too high by the manufacturer's
    spec is the main issue here. If you made no other changes then I'd
    wonder if the new power connectors had enough lower resistance so
    that CPU power draw was that much higher, but it's just a guess.

    Michael Squires, Jan 26, 2004
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