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Thread: Help with cables melting

  1. #1
    Newbie shouryuken's Avatar
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    Dec 2007
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    Help with cables melting

    hay everyone.

    I really need some input from someone with some experience, ive searched the net/ this forum and cant find any answers im confident with.
    I got have a problem with my positive cable heating up, heres the story.

    My Carpc has been in my car for 2 years.
    Ive had ZERO problems.
    One night after driving for about 30mins i stop the car. (carpc shuts down)
    Few mins later i turn the car on and smell the plastic melting on the POSITIVE connection between my cable and the PSU. (as the carpc is booting)
    I have a M2-ATX PSU
    No fuses are blown, cpu still attempts to boot up (but i turn the car off asap before the cable heats up any more.
    The heating starts instantly.

    If anymore info is needed i can add.
    Here is some pics of the connection - cable and PSU.

    Thanks SO MUCH for any help.




  2. #2
    Low Bitrate
    Join Date
    Jul 2007
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    80
    Did you check the whole cable or just the connections? Since the wire has been in for so long, it may have rubbed somewhere and grounded out somewhere. My advice would be change out the cable and see if the problem still exists. Worst case there, you're out a bit of cable and some connectors. If not, I'd start looking into the PSU to see if it's drawing extra current for some reason. Start with the easiest to check and replace first though which is the power line.

  3. #3
    Maximum Bitrate FusionFanatic's Avatar
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    what gauge power/ground wires are you using?

    what size fuse is on your power wire?

  4. #4
    Variable Bitrate mayhembdm666's Avatar
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    There are few things here that could be a cause. More then likely there is a short some where that is causing the current to not flow properly.

    Maybe try the carputer on a normal/another psu and see if the pc boots properly?
    Make sure there are no shavings. Also can you take a photo of the top and side view of your PSU/Mainboard incase one of the capacitors is popped/blown/leaking...
    And a photo of the underside of your PSU.

    My first guess is that the neg and pos are some how touching now or the psu is gone.. Hence make sure the mainboard is still able to boot.

    The affect you are getting is the same as having the two neg & pos touching together..
    2004 Holden WL Caprice Auto GENIII
    Base System = Raspberry Pi
    Everything else is pending for now as switched from a Mini-ITX setup

  5. #5
    Newbie shouryuken's Avatar
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    Quote Originally Posted by mayhembdm666 View Post
    Make sure there are no shavings. Also can you take a photo of the top and side view of your PSU/Mainboard incase one of the capacitors is popped/blown/leaking...
    And a photo of the underside of your PSU.
    Think your right, one of the capacitors looks damaged... check out pic...
    How could this have been caused? Any ideas on fix or just get a new one?


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