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Thread: M1-ATX not surviving crank but M2-ATX does...

  1. #1
    Advanced Member Dave's Avatar
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    M1-ATX not surviving crank but M2-ATX does...

    Morning all,

    I've been out of the loop for a while whilst doing some car mods but the Car PC is still used daily and running really well. The only issue I have is that I've noticed that if I've had the PC running without the engine running and I crank the engine, the M2-ATX powering the PC survives but the M1-ATX running the screen and USB sometimes doesn't.

    Any suggestions on a cure? Or do I simply buy a M2-ATX as a replacement?

    Cheers,
    Dave
    Vauxhall Astra SXi Car PC installed.

  2. #2
    Advanced Member ElKeeed's Avatar
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    Yup the M1 is known not to survive the crank under various circumstances. It is one of the things that they improved with the M2.

  3. #3
    Advanced Member Scouse Monkey's Avatar
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    it could be that you are too close to the limit of the M1 and under cranking it just can't keep up with demand but the M2 can.

  4. #4
    Advanced Member Dave's Avatar
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    Cheers guys - wanted post I guess although I'll check LinITX etc. too.

    Thanks,
    Dave
    Vauxhall Astra SXi Car PC installed.

  5. #5
    Moderator ccsnet's Avatar
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    I never had an M1.... I pioneered using the Opus 90....

    T

  6. #6
    Advanced Member Dave's Avatar
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    Right, I think I have been giving out some misleading information about the symptoms.......Sorry!

    Under normal use I have no problems at all, ever. The problem is more like when the PC has been booted up before the car engine is on and the 'cranking' of the car causes the ignition line to drop below the threshold long enough to initiate the shutdown sequence on the M1-ATX only (obviously different tolerences to the M2-ATX). Both thee M1 and M2 are connected to the same ignition point after going through a 'valet switch' (DPDT c/off) switch..............

    Thanks again, your help is always appreciated.
    Cheers,
    Dave
    Vauxhall Astra SXi Car PC installed.

  7. #7
    Advanced Member Dave's Avatar
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    Back to the problem of the PSUs. It happened again today so I took the opportunity to check and found the VoomPC-2 enclosure LED out and the Monitor on (flashing LED - no input) - this lends itself to the M2-ATX in the VoomPC-2 enclosure not surviving crank????

    Just goes to show you as I automatically assumed the M1-ATX would be the most vulnerable.

    Hmmmm............what to do?..........
    Vauxhall Astra SXi Car PC installed.

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