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    • Hello all,   Another restore thread (I like following these for other people, so I hope you do too)   Picked up a Mac Classic (1) from craigslist for $40 (they were asking $100, but accepted my offer right away, worth it to haggle - untested, dirty, yellow:   Had some interesting stickers/post it note (that must have been on there for 20 years, seems "original" and survived all this time lol) You can see too how yellow/dirty/discolored the case is here too.
        Inside was "ok" lots of dirt in the fan, but just a bit everywhere else.   Motherboard has expected cap leakage - along with a memory riser card which I've never seen in person, neat!   I cleaned the motherboard with 99% IPA - let dry and booted up, but had some really "weird" results!   First power on i heard some crackle from the speaker, but nothing. Flipped the switch a few times, same thing. Then I left it on for a second and all of a sudden the HDD spun up (scaring the crap out of me) Then I see a faint checker board pattern Then a "soft" reboot Then the normal screen but "wavy" eg, the left/right side of the screen was waving in and out The screen got brighter and brighter as time went on, then I got the question mark As time went on the waves slowed and stopped. Internal fan randomly started after a few minutes, again startling me!   My assumption is the analog board needs a recap. Something probably got warm enough to work and eventually was able to boot up.     Next Steps: Recap Motherboard Recap Analog board Service floppy (wont eject) Find a solution for HDD, it sounds like it's on it's last legs Clean outside and try my 40% bottle of hair product method   I can say after working on the CC and SE/30 the past week, the insides of the Classic 1 are much easier to work with.  
    • > I forget which threads they were, its been years. Oh well, that's unfortunate, but at least I know what's wrong with my Mac. This narrows down the list of possible problems a lot, so thank you very much.  I'm reading The Dead Mac Scrolls at the moment and a lot of symptoms (especially the audio ones) point to the flyback transformer. I'm gonna do more research now.
    • Of course - on the premade BeagleBone image, this software is all installed on it already. To run this command, you'd plug a USB cable into the BeagleBone, and then SSH to it by doing "ssh debian@" (It always has this IP) in a Terminal on macOS. Then you'd switch to root with "sudo su", and then "cd ~/mfm", then you can run the command above.   This command just creates the virtual hard disk with the size specified - once you've run this once, you don't need to do it again. You can also run this again to create a fresh image, or to have multiple virtual hard drives if you wanted to that you can swap out. 
    • Can you explain a bit more what you did here?   Can you do all that with the BeagleBone connected via USB to a modern MacOS X computer?
    • No, it is most certainly NOT normal. Voltages should climb up nearly instantly and remain steady at all times. There are many things in this power supply known to cause issues, and I remember running into a handful of threads where stability issues were being caused by a specific component that other members were trying to find functional substitutes for. I forget which threads they were, its been years.