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    1. The 68kMLA Forum Rules   (9943 visits to this link)

      To quote vintage Apple manuals: "Read Me First!"

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    1. General 68kMLA News & Stuff

      What's going down in the barracks.

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    2. Conquests

      Discuss your latest vintage Mac finds!

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    3. Trading Post

      Feel free to trade all of your Mac goodies here with all honest intentions. The website provider assumes NO liability, so buyer beware! Please see this topic for more information.

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  3. Projects & Hosted Forums

    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
      http://retrochallenge.org/

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    2. 68kMLA Wiki

      The creation and maintenance of the 68kMLA's information repository.
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  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

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    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

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    3. 68k LC & Performa

      Ah, the consumer computers!

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    4. 68k PowerBook

      From the Portable to the 190cs.

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  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

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    2. PCI Power Mac & Performa

      The PPC comes of age and adopts the industry standard expansion slot.

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    3. G3/G4/G5 Power Mac, iMac & eMac

      From the Beige G3 to the quad-core G5, via various iMacs!

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    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

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  6. Everything Else…

    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

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    2. Newton

      The best PDA ever finally gets its own forum!

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    3. Software

      Includes system stuff, productivity, emulation, design, and games for pre-OS X Macs!

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    4. Hacks & Development

      Yes, it's back! Hardware hacks/modifications and software development for Mac OS.

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    5. Peripherals

      Anything you can hook up to your Mac or stuff into it as an interface!

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  • Posts

    • How would the flyback be an issue if the CRT is working correctly?
    • I dont know how to get the powersupply open for the 170. I need to replace the capacitors but cant get it open. Does anybody know how? Thanks
    • That's bad luck.   I am no expert but would myself try to confirm that the RAM is good first, as it is possible that you just have two sets of bad ram. After that I would suspect the analog board in general and the flyback transformer in particular, given the varied square and herringbone patterns.   There are others on here who are much more knowledgeable technically, however, who will hopefully chime in, though recurring questions get a little wearing to answer repeatedly....   Some resources that you may or may not know about in the meantime:   https://vintageapple.org/macbooks/pdf/The_Dead_Mac_Scrolls_1992.pdf https://www.jagshouse.com/classicrepair.html
    • I installed the 8MB of RAM I bought for it and now it does this, after displaying vertical lines for a while. Reset sometimes makes it change between vertical lines and this. I've also installed a new PRAM battery.
    • So I've replaced every capacitor and cleaned everything as best I could, still no luck, same issue. I haven't replaced the diodes but I'm not suspecting them as the voltages are now a perfect 5v and 12v. Could this be bad RAM? I have attached an image with what is displays after recapping.
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