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Question about EliteGroup 741GX-M Motherboard

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Failure on powerup?

I just tried to move my GQ machine (Fedora 5) with 741GX-M to a UPS (APC 350 ES). When I tried to power it up, it failed. The CPU and power supply fans spin for about 2-3 seconds then power stops. I see the power light come on to the CD-ROM and possibly the HD (front of bezel). There are no beeps. If I try this a few times in a row, after a couple of tries, the fans do not even try to spin up. I've tried removing the floppy and CD drives from the power chain, and tried removing the memory modules one at a time, but no changes. Is this a PSU failure or a motherboard failure? I don't have another ATX power supply to try.

Posted by ssss dowd on

  • ssss dowd Jul 31, 2007

    Thanks. I plan to try that.

    I also tried jumping the PS-ON to ground on the motherboard 20-pin connector. After doing this, the fan spins up and I measured 5V on the red and 12V on the yellow on the peripheral connectors (I may have those backwards), and the appropriate voltages on the 20 pin connector (12, 5 and 3.3). Does this still sound like the power supply? That's the first thing I'm going to try. Just wondering if I should buy a motherboard too when I'm there...

  • ssss dowd Aug 01, 2007

    It was the PSU. Just put in a new one and it fired right up. Thanks!

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I suspect that your PSU is faulty... can you buy another one? This is a fairly typical of a "Blown PSU" symptom to me... I would try replacing the PSU, and then connect ONLY the Motherboard, if OK, then Hard Drive, if OK then .. and so on.. I advise this as it MAY be something connected to the PSU that caused it to "Fault" but generally they just go Toes Up for no real reason.. other than PSU component failure.

Posted on Jul 30, 2007

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