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Thread: opus120 won't start comp

  1. #1
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    opus120 won't start comp

    Opus tech support is closed, but in the mean time I was hoping for some ideas:

    I have 12v on both yellow power wires. Grounded the two black to the frame. 12v acc from back of stereo to red wire. Blue is just wire nutted. I didn't know yesterday where to plug in the power-on wires on the mobo, so I was just using a power switch from an old dell.

    -Turn key to acc; dash, radio light up.
    -10sec later cpu fan on mobo starts. No VGA signal.
    -I hit the power button and the mobo just beeps at me until I hold down the power button to shut down.

    I ran an extension cord to an old psu and connected that to the mobo and the power switch starts the comp and I see the mobo post on the lilliput.

    Is it imperitave to hook up the power wires from the opus to the mobo? Any ideas?

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    It would help if we knew the specs of the computer...
    It's very likely that your system requires more power than the Opus120 can provide.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #3
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    via M10000 512Mb ram. one 250gig HD. I can't imagine that would overload a 120w supply. I now see that there is another thread on the 150. I tested all the connections on mine when I was working on it and everything is within +/- .1V

  4. #4
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    I just got off the phone with the Opus tech support. He said that the psu will get all the voltages up and running within 5ms, but some via boards (1%) require them to be up in 2ms. He offered two possible solutions: Load a new bios or mail them both the psu and the mobo so they can match the psu's timing to the board.

    Anyone have this problem?

  5. #5
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    Quote Originally Posted by giddonah
    I just got off the phone with the Opus tech support. He said that the psu will get all the voltages up and running within 5ms, but some via boards (1/100) require them to be up in 2ms. He offered two possible solutions: Load a new bios or mail them both the psu and the mobo so they can match the psu's timing to the board.

    Anyone have this problem?
    Sounds like too much work, to me. I was about to spring for a 120 watt opus, but not if I have to go through this.
    Is this where the witty comment goes?
    97 Black pearl Mazda Miata MX-5 Carpc V2? maybee..

  6. #6
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    Same thing here with a 150 and a Shuttle XPC motherboard. Just shipped off my PSU and Mobo for testing.

  7. #7
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    did you try the bios update before shipping it off? I'm going to try the bios thing tonight. I'm not too hopeful though. I'm not too excited about having to mail this stuff off. And what happens when I install the next one? I have to ship that one off too? I don't think so. The guy said it was a 1/100 chance, but I think he's got NASA's statisticians giving him his numbers

  8. #8
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    The guy I spoke to never even mentioned a bios update. I wasn't too happy about having to send it off either, you'd think they could just make the power supply conform to ATX spec better and not have these compatability issues.

  9. #9
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    That's the thing though. The guy I spoke to said there wasn't any atx standard for how fast all the voltages need to come up, or which leg the mobo looks at as an indicator for anything. Even if it's not the absolute best, conforming is a good thing. Look at Panoz. They make crazy *** cars, but drop chevy engines in them so you can get the thing fixed when it breaks.

  10. #10
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    Well, they found the problem. Even though the whole system only draws about 100W, it's overloading the 5V rail. The Opus 150 maxes out at 10A and my system with just processor and memory was drawing 13A, and with video card 17A. It looks like I'm just going to have to go with an inverter. Maybe I can get a pure sine wave one.

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