macintosh lc iii

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  1. jack 68k

    Reconnaissance: Modern Diagnostics for your Classic Mac

    #MARCHintosh 2026 is here and I'm excited to share a project I've been working on. https://reconnaissanceapp.com You may know that many Classic Mac models have a diagnostics mode built into the ROM that you can access over a serial connection. But it's extremely cumbersome, limited, and there...
    • jack 68k
    • Thread
    • diagnostics macintosh ii macintosh iicx macintosh iisi macintosh lc iii macintosh se/30 marchintosh2026
    • Replies: 18
    • Forum: Macintosh II
  2. theirongiant

    LC III: internal speaker works intermittently when pressing on the external audio jack. Audio plays through external jack when connected.

    I have an LC III that boots and runs normally, but the internal speaker doesn't work. Well, at least I thought it didn't at first. External audio works; I heard the startup chime, quacks, and wild eeps through headphones. By accident I was pushing the headphone jack while turning it back on...
  3. I

    Need someone to make rom

    I recently have gotten a Macintosh LC III, the rom on it was bad and did not work, I need someone to make me new rom because I can't find any rom for it online.
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