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Thread: Opus 90W dead?

  1. #1
    Constant Bitrate
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    Opus 90W dead?

    Hey ppl,

    So i was playing around with some wiring in my car yesterday and now my car pc no longer works.

    After some investigation and getting it out the boot! i managed to find that my opus 90w psu has blown a fuse. So i got a new one and put it in.

    Since i have a bench supply i brought the pc inside and hooked it up to my 12v supply and tried again. I fired up my power supply which put 12v onto the switched and live and gave it a 0v line. The ignition light on the psu works and flicks on and off...the power light on the mobo lights. However, then the pc tries to turn on (either by the opus providing an on signal about 5 seconds after turn on, or by me just pushing the power button, i tried both!).....then light on the mobo just dies out as if the power supply can't cope.

    I don't know whats wrong, there is no obvious blown components.

    Any ideas?

    Thanks guys

  2. #2
    Constant Bitrate
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    any ideas?

  3. #3
    FLAC freeflashstuff's Avatar
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    You may be pulling too much power from the Opus.
    then light on the mobo just dies out as if the power supply can't cope.
    How many times does the light on the Opus blink?

    Interpreting the Green Status LED light flashing

    0.1 sec ON and 2.5 Sec OFF: DC-DC power supply is in Idle or stand-by state.

    On constantly: The PC is powered and the PC should be operating.
    Number of flashes: Reason for flashing:
    1 Flash: Battery voltage is below normal operating range.
    The normal range is 11.5 VDC to 18 VDC.
    During engine cranking the low battery voltage detection is ignored so the battery voltage can dip below 11.5V.

    2 Flashes: The computer power up sequence failed.

    Reasons:
    1. Check the wiring of the two wire power-switch cable from power supply connector J9 to power switch pins on the ATX motherboard. If connected properly check the polarity of the power switch pins. May be reversed.
    2. Check ATX mother board bios settings.
    3. Locked up mother board or software crash of bug.
    4. Faulty DC-DC power supply.

    3 Flashes: Power supply output voltages are out of normal voltage range.

    Reasons:
    1. Power supply output is over loaded or shorted.
    2. Faulty DC-DC power supply.

    4 Flashes: Power down, stand-by or hibernate sequence failed.

    Reasons:
    1. Check the wiring of the two wire power-switch cable from power supply connector J9 to power switch pins on the ATX motherboard. If connected properly check the polarity of the power switch pins. May be reversed.
    2. Check ATX mother board bios settings.
    3. Check if ACPI function is enabled in the power management BIOS setup.
    4. Make sure ACPI drivers are installed in the operating system.
    5. Check if application is compatible with ACPI mode of operation.
    6. Locked up mother board or software crash of bug.
    7. Faulty DC-DC power supply
    I have bad luck with vehicles...

  4. #4
    Constant Bitrate
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    thanks for the reply, the psu flashes twice then waits, the flashes twice again.

    The mobo works fine when plugged into a mains psu...

  5. #5
    FLAC freeflashstuff's Avatar
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    2 Flashes: The computer power up sequence failed.

    1. Check the wiring of the two wire power-switch cable from power supply connector J9 to power switch pins on the ATX motherboard. If connected properly check the polarity of the power switch pins. May be reversed.
    2. Check ATX mother board bios settings.
    3. Locked up mother board or software crash of bug.
    4. Faulty DC-DC power supply.
    I have bad luck with vehicles...

  6. #6
    Constant Bitrate
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    Quote Originally Posted by freeflashstuff View Post
    2 Flashes: The computer power up sequence failed.

    1. Check the wiring of the two wire power-switch cable from power supply connector J9 to power switch pins on the ATX motherboard. If connected properly check the polarity of the power switch pins. May be reversed.
    tried both ways round and also tried it by just shorting the pins on the mobo

    2. Check ATX mother board bios settings.
    must be ok if booting from a mains psu

    3. Locked up mother board or software crash of bug.
    same as 2.

    4. Faulty DC-DC power supply.
    maybe?

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