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  1. ROM download: https://www.macintoshrepository.org/7038-all-macintosh-roms-68k-ppc- Sometimes must be splitted up into 2 Files.
  2. Did you measure the voltages at the floppy port? Must be 5 and 12V. Fluctuating voltages can result in rebooting. The AB should be recapped!
  3. I used a 3D printer to print the bumpers with TPU (polyurethane). Worked for me.
  4. I do not know, if it matters, but the SE/30 had somtimes a 800KB drive when it was upgraded from a SE. The floppy cable had a yellow cable at one side. I have one of those upgraded versions. The 1.44 MB floppy cable had a red cable. Perhaps you have the wrong cable in the SE/30? Please correct me, if the cable color has no influence on the function.
  5. Why did you use another optocoupler? I used a CNY17G-3 and it worked. They are still available.
  6. If you use the "press and turn" technique to remove the cap, the black plastic part often breaks. Then it is very easy to remove it.
  7. Classic AB have most often problems with: TDA4605, CNY17G, IRFBC40, DP3 and DP4 (1N4148). Sometime the two RIFA capacitors (CP19 & CP38) are cracked.
  8. Clean and Reseat the ROM. Could be a problem with the ROM. Do you have a RAM expansion board, then try it without the board.
  9. ROMs sometimes fail, when they are old. You can use 27C512 Eproms. This may help: https://oldcrap.org/2019/03/22/macintosh-plus/ Here you can download ROMs and see a decription of a repair: https://www.nightfallcrew.com/25/04/2014/macintosh-plus-sad-face-repair/ More ROMS: https://www.macintoshrepository.org/7038-all-macintosh-roms-68k-ppc-
  10. Could be a problem with the ROM or the RAM. I would change the ROM and the RAM between the working and non working logic board.
  11. Here you can see a description for a client/server configuration with one Mac with system 6 and one with system 7 https://metalbabble.wordpress.com/2020/03/21/sharings-caring/
  12. For reaching the internet this may help: http://ivanx.com/a2server/ Or: https://www.macip.net/ Both need a localTalkBridge (hardware or software) and a raspberryPi. I use both and they work with an Classic.
  13. This should work for you: https://www.macintoshrepository.org/articles/35--connecting-two-macs-with-a-serial-connection Did you use a printer cable? Here is another website for networking classis macs: http://www.applefool.com/se30/
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