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Darrell Johnson

6502
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  • Gender
    Male
  • Location
    Orange County, CA
  • Interests
    Bible studies, Retro Computing (Mac, NeXT, SGI, Sun), classic Toyota Four Wheel Drives

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  1. Darrell Johnson

    Duo 230c Heating up - battery short?

    Technical correction " For the grayscale Duo 210 and 230 there are no electrolytic capacitors to replace in the display . . . "
  2. Darrell Johnson

    Duo 230c Heating up - battery short?

    Update: For the grayscale Duo 210 and 230 there are no capacitors to replace in the display, so you only need to focus on capping the motherboard. Other Duo models as show above will have capacitors to replace in the display. I'm attaching a photo of the Duo 230 Display Board and also the full Macintosh Duo 200 Series Repair Manual which provides detailed instructions on how to disassemble. For video disassembly, please refer to Jason's Macintosh Museum YouTube "Apple Macintosh PowerBook Duo 250 (1993) Full Tour and Disassembly" PowerBook_200_Series_Apple_Repair_Manual.pdf
  3. Darrell Johnson

    Notice to Powerbook Duo Users!

    Update: Refer to this post for Duo Display Recapping:
  4. Darrell Johnson

    Duo 230c Heating up - battery short?

    Excellent @sutekh Thanks for the excellent pics! I stand corrected. Inserting this phrase for search: "Duo display recapping"
  5. Darrell Johnson

    Duo 230c Heating up - battery short?

    Related Post to Duo Recapping - https://68kmla.org/forums/index.php?app=forums&module=forums&controller=topic&id=48570 Also - I verified my issue was due to electrolytic fluid from leaking motherboard capacitors migrating down the board to short out the battery connector. While the motherboard recap is doable, there are also capacitors in the display that are much more difficult to replace.
  6. Darrell Johnson

    Duo 230c Heating up - battery short?

    I'm not sure we have the same exact issue, but my Duo 230 recently developed a burning smell, which I narrowed down after disassembly to the area of the motherboard near the battery charging terminals. In my case the Duo continues to work, but I don't want to use it. In my case the NiMH battery was not installed, and the Duo was operating on the adapter, so it was not the battery.
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