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  1. I would recap the logic board first. Often the caps on the LB cause the checkerboard. Low voltages on the AB can be a result of leaking caps and can result in a checkerboard. Start with cleaning and recapping the LB. Take the battery out of LB especially if it is Maxwell! For cleaning the LB isopropylalcohol is the best.
  2. dochilli

    512k with very unique fan

    I think that 020020 means that you have a RAM error at location F10. You have to change the RAM chip. Old RAM chips somtimes fail.
  3. dochilli

    AppleTalk net cable

    Perhaps an orange pi and a localtalk bridge may be interesting for you. The orange pi can be a fileserver. For futher information you can read here: https://www.macip.net/ You can surf in the internet with localtalk too. I use this configuration and it works great.
  4. dochilli

    Would these Floppy Disks work on a Macintosh SE/30?

    The easiest way is to use a D sub 25pin male to D sub 25pin male cable. It must be a 1:1 straight through cable. I have this one: https://www.reichelt.de/d-sub-kabel-1-1-25-pol-stecker-stecker-1-8m-ak-401-p3996.html?&trstct=pol_0 An adapter is not necessary.
  5. dochilli

    Questions about the SCSI2SD (Macintosh SE/30)

    A SE/30 works with the SCSI2SD without the usb power. You only need the 25 pin cable. Only the mac plus needs the external power, if I remember right. The mount is here:
  6. dochilli

    Would these Floppy Disks work on a Macintosh SE/30?

    I would take SCSI2SD with the 25 pin connector. Then you have all options to use it as an external hdd too.
  7. dochilli

    Would these Floppy Disks work on a Macintosh SE/30?

    If you are interested in generating floppy disks by yourself, here you can find some useful links: http://spt0010a.sport.uni-oldenburg.de/bycmac/index-Dateien/Page661.htm
  8. dochilli

    Would these Floppy Disks work on a Macintosh SE/30?

    I would buy a SCSI2SD as soon as possible. Connect it to the external SCSI. I think the 5.1 has the option for an external connector (DB25). Format the drive, then you can copy your files. Or buy an external SCSI case and install the SCSI2SD inside. Then you have the chance to change the sd card and use the case with different macs. For fomatting scsi disks you can use Lido. May be good to have this on a bootable floppy disk with system 6.0.8 or 7.1. Here is a description, how to install a SCSI2SD:
  9. dochilli

    Bootable SC20 with IBM disk

    Did you format the hdd with lido? I had success with my hdd with lido.
  10. dochilli

    Classic: Clock won't run

    The solder of the crystal does not look very good. I would resolder it. And one connection between UB5 and C2 seems to be corroded.
  11. dochilli

    I resurrected a Mac SE hard drive!

    I used a SCSI2SD to save the data of old harddisks. Most of my „repaired“ hdd did not work for a long time. Sometimes there are sticky bumpers in the hdd that can be replaced.
  12. dochilli

    M0100 Mouse: New internal plastic housing?

    At thingiverse you can find a printable housing but not the inner parts. Perhaps you can ask the constructor of the housing, if he can construct the inner part too? https://www.thingiverse.com/thing:457953
  13. dochilli

    New case of Simasimac -- at my wit's end!

    If you do not get a chime, the board has a problem to see the ROM. Can be broken traces. You should check the continuity of the traces to the rom. You need the schematics for that job. Sometimes UE8 is defect and must be replaced. I had a board with no chime and had to replace two of the F258 chips. Then it worked again.
  14. dochilli

    Mac SE/30 LCD conversion possible?

    Have a look here:
  15. dochilli

    Classic II weird issues after analogue board recap

    4.7 V is a little bit low. There is a potentiometer on the AB where you can adjust the voltages. But be carefull and check the voltages while you change the poti. And observe the voltages for a few minutes. 4.85 V up to 5V are good values.