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Recent content by zezba9000

  1. zezba9000

    Macintosh LC with Pico-PSU boots without -5v ?

    Seems people are confused in posts. So to be clear. <<< Original PSU >>> * Doesn't work but ordered caps * Gets super hot * Voltages wrong <<< Off-brand Pico PSU I have in hand >>> * Works / Tested * -12v line reports as -7.2v with zero load * -12v line reports as -5.2v when Mac LC is powered...
  2. zezba9000

    LC II - no chime, no display after recap

    You should only need to replace the electrolytic caps. If it worked before its probably not the PSU atm. Are those pictures of the board after you recapped? Did you use heat gun? Did you pull up any traces? Did you wash board off with IPA (isopropyl alcohol)? Or Its possible you broke a trace...
  3. zezba9000

    Macintosh LC with Pico-PSU boots without -5v ?

    You use a 7905 negative voltage regulator to get -5v from -12v. Its in my earlier post.
  4. zezba9000

    Macintosh LC with Pico-PSU boots without -5v ?

    Oops this "have a pico PSU with a weak -5v line of around 7.5v with no load." Should have been: "have a pico PSU with a weak -12v line of around 7.5v with no load." Said -5v instead of -12v line. So week -12v line thats -7v with no load but goes to -5.2v with mac powered on in short.
  5. zezba9000

    Macintosh LC with Pico-PSU boots without -5v ?

    So in short I really want that -5v line to make sure I don't limit some hardware. So other question is: I have a pico PSU with a weak -5v line of around 7.5v with no load. If I power the Mac LC, the -5v line runs at -5.2v. Will this harm anything long term. I also ordered a new Pico PSU & can...
  6. zezba9000

    Macintosh LC with Pico-PSU boots without -5v ?

    So my LC PSU is bad (smells bad to & gets stupid hot). I will try replacing caps but if something else is wrong I'm using a Pico PSU. So I did some Pico PSU tests to make sure computer boots fine (& it does) BUT I found out I don't need the "-5v" line to be connect... What is the -5v line used...
  7. zezba9000

    Macintosh Centri 650 (missing pwr button)

    Made a button & here is a link: https://cults3d.com/en/3d-model/various/macintosh-power-button
  8. zezba9000

    Macintosh Centris 650 (Green tint)

    Green Tint now goes away once computer boots & I use the 10 switch adapter I got with pins 2,3,5,6 ON. Other adapters still don't work. Here is the adapter I got: https://www.ebay.com/itm/271137033572
  9. zezba9000

    macintosh centris 650 floppy question

    The hard drive in mine went out as well. I was able to fix it by taking it apart and cutting with wire-cutters off a peace of plastic blocking the head from moving and reading the disk. You can turn the drive on with the lid off to see if the head moves or not. If thats all it is, its easy to...
  10. zezba9000

    Macintosh Centri 650 (missing pwr button)

    I can't for the life of me find any 3D printable replacement button for this. Anyone know if one already exists? If not I'll have to make one.
  11. zezba9000

    Macintosh Centris 650 (Green tint)

    Got one of these 1-10 switch ones as it has a specific switch for "Sync on Green". Hopefully that also just works. https://www.ebay.com/itm/271137033572
  12. zezba9000

    Macintosh Centris 650 (Green tint)

    Is this just a sink on green issue? My 4:3 LCD this happens sadly. I ordered an original video cable as I can an original VGA convert I'm going to try next. But are there better 3rd party VGA converts that work better? I'm using a Griffin 1-8 switch one at the moment.
  13. zezba9000

    LC II dual floppy ports possible with soldered connector?

    I see guess I didn't take close enough look as it was in the same spot.
  14. zezba9000

    LC II dual floppy ports possible with soldered connector?

    Macintosh LC has two floppy connectors on its motherboard. LC II only has one BUT has what looks like a spot for it. If I solder a connector here will it work?
  15. zezba9000

    Color Classic best way to transfer files over Ethernet?

    I ended up using "MacTCP" + "Fetch" that could connect to "BabyFTP" on Windows. Keeps it simple and it works well.
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