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  1. Y

    Unchanging voltage with voltage resistor change

    Thanks Bibilit, I finally found another post that was having a similar issue. I think it might've been you that talked about the U3 component. I think you are right, I just don't know how to test it. This computer is actually my dad's, so I told him what I had done so far, recommended U3 and the...
  2. Y

    Unchanging voltage with voltage resistor change

    Update: I removed and tested a bunch of capacitors that the Classic Mac Repair Notes indicates are prone to failure, all were good (C24-C26, C29-C31). I did find out that CR29 was bad, so I replaced it with an equivalent diode (hopefully). I plan to wire it back up and test this afternoon. ...
  3. Y

    Unchanging voltage with voltage resistor change

    First post - thank you for the awesome information I've been able to track down so far. I haven't tried everything yet, but I think I've got enough to start a thread. Apologies if this is covered elsewhere and I missed it. I've had my grandmother's OG Macintosh (I think it's legit, Model M0001)...
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