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Thread: Just got back my RMA'd M4...and guess what?

  1. #21
    FLAC WuNgUn's Avatar
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    My 12V rail on my 120V AC ATX PSU that's powering the M4 is dropping to 9.5V when the PC is on!
    But I had this exact same problem when it was in the car, running off 13+ V and God knows how many amps...

  2. #22
    Raw Wave Rob Withey's Avatar
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    Quote Originally Posted by WuNgUn View Post
    My 12V rail on my 120V AC ATX PSU that's powering the M4 is dropping to 9.5V when the PC is on!
    Are you loading up the 5v rail of the 120V AC ATX PSU when feeding the M4 from it, or is the M4 (and carPC) the only device being powered? This is a common problem discussed several times on this forum.
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  3. #23
    FLAC WuNgUn's Avatar
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    Quote Originally Posted by Rob Withey View Post
    Are you loading up the 5v rail of the 120V AC ATX PSU when feeding the M4 from it, or is the M4 (and carPC) the only device being powered? This is a common problem discussed several times on this forum.
    Any 5V line?
    I'll feed 5V from the AC/DC PSU into my water pump and retest...

  4. #24
    FLAC WuNgUn's Avatar
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    I added another 12V to feed the M4, and loaded down the 5V output with my pump...
    No change to the V to the M4...and no change in my problem...

  5. #25
    FLAC WuNgUn's Avatar
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    At least I got confirmation about my OPUS being shipped out...
    If I STILL have the problems with THAT PSU, I'm gonna throw my carPC out 'da window!!!

  6. #26
    FLAC WuNgUn's Avatar
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    Got this reply from Mini-Box...

    1) For troubloeshooting purposes, use another monitor. If you no longer see the intereference on another monitor, you have a bad monitor design.
    2) Try a different VGA cable. Shorter is better. Thicker is even better.
    3) Do not ground your PC to the Car chassis. Cars are nery nasty ground enviroments.
    4) If you have any other peripherals hooked up to the PC, try removing them one by one and see what's causing the interference problems.
    5) Most important: Never use the car chassis for a ground tap. Go strainght to the battery for both Positive and Negative wires.
    6) Try to power the monitor from the same source, from the same point. Example: Do not power the monitor from your cigarette lighter and your M4-ATX from battery.

    None of this helps me though...

  7. #27
    Variable Bitrate
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    Quote Originally Posted by Sonicxtacy02 View Post
    sucha shame too cause the "idea" of the m4 was a great one.. especially after the success of the m2. If i ever need to go bigger than my m2 i'll go dATX... least i know i can trust jeff if crap hits the fan
    Jeff is not much better. Get an OPUS.
    Audio: 4 * Rainbow Audio Germs + Infinity Basslink / Case: iStarUSA S3 / CPU: C2D P8700 / MB: Jetway NC64-LF / SC: ASUS Xonar Essence STX / RAM: Crucial 2x1GB 1066MHz / HD: MTRON 2.5" 30GB / DVD: Panasonic UJ-815B / PSU: Opus 180w / LCD: Xenarc 700TSV

  8. #28
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    Thank god my Opus worked right out of the box.

    I would have spent a month going in circles if I'd had PSU problems.

    I'll be anxious to hear the outcome of this one.

  9. #29
    FLAC WuNgUn's Avatar
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    Quote Originally Posted by ClockWorK View Post
    Thank god my Opus worked right out of the box.

    I would have spent a month going in circles if I'd had PSU problems.

    I'll be anxious to hear the outcome of this one.
    Still waiting for MY Opus...
    M4 will be going up on Ebay likely...

  10. #30
    FLAC Dougw133's Avatar
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    If it makes ya feel any better my M4 arrived and the 12 Rail doesn't have power...

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