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Thread: Why does it shut off hard for no reason?

  1. #11
    Fusion Brain Creator 2k1Toaster's Avatar
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    I assume the monitor is either commected to the PSU or to the same skinny wire in the wiring harness right? Do yourself a favour and actually run a wire from your battery.

    In mains wiring there are two considerations, voltage drop and heat buildup. The smaller the wire is, the higher the resistance is. When the resistance is higher, the wire heats up more, and there is more voltage drop in the wiring. The former is why you need higher-temperature insulation and/or bigger wires for use in conduit; the latter is why you should use larger wire for long runs.
    So the wire that is already straining to pull enough current to keep your stuff powered, is heating up, and up, and up until the copper wire causes enough of a voltage drop to send the computer into unstable operation.
    Then it is just a matter of seconds before the pretty yellow flame of death envelopes you and your car and there goes your over-paid computer.

    I drew a diagram of this a while ago... I wonder if I still have it...
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  2. #12
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    First fix your dangle (which I think you have from your previous posts) and verify that all your power and grounds are secure like everyone else has suggested.

    I have had the same experience with my CarPC and it had nothing to do with wiring. Basically my problem was software. I had a bad device driver for my USB GPS reciever and my CarPC would BSOD (Blue Screen Of Death). Now, The screen will NOT turn BLUE if you have automatic restart with a mini dump enabled. The system will appear to turn off and then back on.

    Your signature doesn't say what OS you are running. This response may be totally off your root cause, but hey, a similar sympton (Hard turn off and then boot up a few seconds later) happened to me and I simply re-installed my drivers and Wah-LA, no more crashing (reboot).


    You can turn off the automatic restart which will then display a blue screen. Often times the BSOD will point to a specific .dll or .sys file that crashed. This is how I knew to re-install/update my dirver to fix the issue.

    Anyhow thought I would throw in a different opinion/perspective on your issue.

    Good Luck with it.

  3. #13
    Fusion Brain Creator 2k1Toaster's Avatar
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    Found my graphical representation of your doom to come:

    Name:  No No.JPG
Views: 366
Size:  45.9 KB
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  4. #14
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    Toaster.... That is totally awesome.

  5. #15
    FLAC
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    haha that's hot!
    I'll try the software, but I have some more input. I was just out for a drive and the right side speaker was staticy so I touched the wiring harness in the dash and it cut in and out. I touched it again and it cut in and out again. Obviously the tape is not doing a stellar job of creating the connection between the wires (I've only been told that here about 60 times). But I finally witnessed it first hand and it's possible the same weak connection could be made on the power/ground wire coming out of the harness.

    Why do you say to run the screen power to the battery? Doesn't it need constant power supply?
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  6. #16
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    again, shoddy install, shoddy wiring. Follow the link I posted about earlier. I spent a while outlining and finding sites that would explain how to wire and terminate correctly.
    Jan Bennett
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  7. #17
    Fusion Brain Creator 2k1Toaster's Avatar
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    Why do you say to run the screen power to the battery? Doesn't it need constant power supply?
    I don't know what kind of magical battery you have, but my yellowtop is a constant source of power, unless I drain it...

    Only thing is that is not perfectly reguated at 12v. That's why your screen cam with a cigarette lighter adaptor. Chop off the cig plug part and there should be a box with a fuse and inductor and fairy pixies (maybe???). That takes the battery voltage and turns it to screen voltage for always on. Or run it through your PSU if you have enough room left which you do.

    The part that people are throwing virtual stones at you for...


    ... is the power wire thing. The ign wire is fine to come from the harness. But for the constant power wire, you need more umph. We're not talking about a crappy little HU, it is a computer! They need juice, and you have taken its glass away and replaced it with a cofee stirrer... Pas bon.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  8. #18
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Why do you ask for advice... then not listen or even argue the point?
    TruckinMP3
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  9. #19
    FLAC
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    Quote Originally Posted by Red GTi VR6
    again, shoddy install, shoddy wiring. Follow the link I posted about earlier. I spent a while outlining and finding sites that would explain how to wire and terminate correctly.
    I didn't look at that because I don't have a soldering iron and don't want to buy one for a single application. I feel bad, and I appreciate you looking up the links for me, but I have to work with what I have. Somehow I can make it work.
    Ampie Case
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    256 MB DDR2 PC5400
    Xenarc 700TSV - VGA Monitor
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    2005 Honda Civic

  10. #20
    FLAC
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    Quote Originally Posted by 2k1Toaster
    I don't know what kind of magical battery you have, but my yellowtop is a constant source of power, unless I drain it...

    Only thing is that is not perfectly reguated at 12v. That's why your screen cam with a cigarette lighter adaptor. Chop off the cig plug part and there should be a box with a fuse and inductor and fairy pixies (maybe???). That takes the battery voltage and turns it to screen voltage for always on. Or run it through your PSU if you have enough room left which you do.

    The part that people are throwing virtual stones at you for...


    ... is the power wire thing. The ign wire is fine to come from the harness. But for the constant power wire, you need more umph. We're not talking about a crappy little HU, it is a computer! They need juice, and you have taken its glass away and replaced it with a cofee stirrer... Pas bon.
    I do have the screen running through the PSU. It's running off an extra molex connector I used by chopping up the cigarette lighter adapter.
    Ampie Case
    2.5" Hard Drive 80GB Samsung 5400RPM
    256 MB DDR2 PC5400
    Xenarc 700TSV - VGA Monitor
    Intel D945GCLF Motherboard
    M2-ATX-HV

    2005 Honda Civic

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