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  1. #1

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    Who fixes MFD's?

    Can these be fixed and is it even worth it? Its from a 2000 785 PRO. It doesn't work at all it looks like its gotten water in it and either frozen and/or shorted out and melted inside. It has a crack in the case. Any chance its fixable or just throw it out and who works on them?

    Thanks.


  2. #2
    thester71's Avatar
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    This is the one from my 99' pro 785, It sounds like yours is the same. post some pics
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  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    MFD melted + water inside = junk

  4. #4

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    Mine is opened up but will try to get a picture I'm sure its probably junk though. Thanks

  5. #5
    Wow, those things just cook like that?

    Thats absolutely not repairable.

  6. #6
    Quote Originally Posted by ZOMGVTEK View Post
    Wow, those things just cook like that?

    Thats absolutely not repairable.


    I'm gonna guess that water+voltage = burnt PCB. I doubt the boards just burn up on their own without moisture present.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ZOMGVTEK View Post
    Wow, those things just cook like that?

    That's absolutely not repairable.
    Reverse battery polarity can do a number on the MFD too. Especially if someone has replaced the original 1/4 Amp fuse with something larger.

  8. #8
    Quote Originally Posted by K447 View Post
    Reverse battery polarity can do a number on the MFD too. Especially if someone has replaced the original 1/4 Amp fuse with something larger.
    Yeah, I came to the conclusion that it was reverse polarity forced on the unit. From a severely inappropriately fused setup or lack thereof.

    It would take an absolute terrible designed product to do something like this from moisture, without the presence of a few kV.
    The MFD should operate at least temporarily submerged under water. Its whats left on the board after the waters gone that causes the real issues.

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ZOMGVTEK View Post
    ...The MFD should operate at least temporarily submerged under water. Its whats left on the board after the waters gone that causes the real issues.
    All Polaris digital displays are fully sealed from water intrusion.

    There was a manufacturing defect in some early MFD, that allowed water in through a pin-hole in the sealant for the 8-pin connector on the back.

    Other than that, if there is water inside an MFD, something has cracked to allow the water in.

    Inside the MFD is a small packet of silica gel, which absorbs moisture. Same stuff you find when you open a new camera box. It is intended to absorb any moisture inside the case after sealing at the factory. It cannot absorb the water from a leak.

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