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(Topic ID: 208753)

Water deposits or battery damage?


By ThatOneDude

2 years ago



Topic Stats

  • 13 posts
  • 7 Pinsiders participating
  • Latest reply 2 years ago by lyonsden
  • No one calls this topic a favorite

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    There have been 7 images uploaded to this topic. (View topic image gallery).

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    #1 2 years ago

    The top picture is definitely battery damage. Are the other two also battery damage? They look a bit different to me, so I was wondering if it's a water deposit.

    20180130_212001 (resized).jpg
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    #2 2 years ago

    Battery damage. Unless you have green water.

    LTG : )

    #3 2 years ago

    All 3 are battery damage.

    #4 2 years ago

    Well, damn. Is there any point in trying to save a board with that much battery damage?

    #5 2 years ago

    Depends on how extensive it is. If it is just those areas you pictured, it doesn't seem too bad. Just remove the affected components and clean up the board.

    Go ahead and post full photos of the board for a better assessment.

    #6 2 years ago

    First I used vinegar to neutralize the battery acid and stop it from going ahead.
    Then cleaned it and fixed what was not working.

    #7 2 years ago

    Most of the driver board looks like it has some level of green corrosion on the solder joints. About half of the mpu board does. Everything roughly above the batteries seems to still be relatively shiny.

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    #8 2 years ago

    I believe there was a thread or posting about using Zep acidic toilet bowl cleaner to remove the alkaline .

    #9 2 years ago
    Quoted from lucky1:

    First I used vinegar to neutralize the battery acid and stop it from going ahead.
    Then cleaned it and fixed what was not working.

    vinegar actually doesn't do a whole lot--it's not acidic enough to counteract the alkaline. zep toilet bowl cleaner works much better, and you can actually see the reaction happening where the alkaline is removed and dissolved.

    #10 2 years ago
    Quoted from ThatOneDude:

    Most of the driver board looks like it has some level of green corrosion on the solder joints. About half of the mpu board does. Everything roughly above the batteries seems to still be relatively shiny.

    You'll have a fair number of components to replace, but it looks like all the traces and pads are intact, which is the main thing.

    #11 2 years ago

    Got a mess of cold solder joints, too

    20180130_224824 (resized).jpg

    #12 2 years ago
    Quoted from ThatOneDude:

    Got a mess of cold solder joints, too

    That's fairly typical of these boards when they haven't been refurbished. All the header pins should be replaced anyway at this point.

    #13 2 years ago

    If you want to rescue that board, you'll need to take off and replace/clean all the affected components, neutralize/scrub away the damage, replace components, and cover the exposed traces from scrubbing with something like clear nail polish. This is a great thread on the topic: https://pinside.com/pinball/forum/topic/stripping-battery-corrosion-with-a-strong-acid

    If you go down this route, make sure to invest in decent desoldering and soldering guns.

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