Recent content by Garrett B

  1. Garrett B

    Macintosh PowerPC 4400/200 Video Problems

    When you get the black screen, is this with onboard video or a PCI video card? I am currently only able to get video out using a PCI card, and am curious what your setup is. I may have similar memory issues!
  2. Garrett B

    MacEffects Performer PDS 68030 - I can't get it going

    The CPU runs at 16MHz on these cards regardless of what processor is installed on the Performer board. Having a 40MHz marked CPU is nice but it’s still only going to run at 16MHz…
  3. Garrett B

    Performa 475 System Installer fault ...

    Yes it's the overclock causing trouble. You can use an emulator like Basilisk to install onto the disk image you're using. You could also revert back to stock 25MHz speed to do the install, then try the overclock again. Easiest thing would be to install from a modern computer, then reinsert the...
  4. Garrett B

    Opening up Mac Portable Battery

    I've used a Dremel tool with a thin cutting disc attached. Work your way around the case slowly and you should be able to reattach the top fairly easily!
  5. Garrett B

    Yikes. I was thinking the 180c and 280c had the same panel - guess not.

    Yikes. I was thinking the 180c and 280c had the same panel - guess not.
  6. Garrett B

    Se/30 questions

    If it's booting and just has no video, I'd check the Molex plug that's on the logic board, specifically continuity of video signals that go to the AB. I have found a break there which resulted in the exact thing you show.
  7. Garrett B

    Macintosh Portable Video Adapter

    I don't have one yet, but am strongly considering it. Troubleshooting boards would be much easier!
  8. Garrett B

    Macintosh Portable Video Adapter

    Is this what you're looking for? https://androda.work/product/vga-adapter-for-macintosh-portable/
  9. Garrett B

    30Video: New video board for SE/30 / IIsi / more?

    Wow... great catch. I just confirmed by looking at an original photo and decoding the color bands. I have parts to build a neckboard of my own but haven't started yet. Guess it's time for another DigiKey order!
  10. Garrett B

    Power Macintosh 9600 with No Sound

    The board itself is clean (no corrosion), and I did insert/remove the headphone plug a few times to see if that might clear things up. No luck. I guess next step is break out the multimeter and see if the contacts are closing inside the connector when headphones aren't connected. This is where...
  11. Garrett B

    Power Macintosh 9600 with No Sound

    So "no sound" might be a stretch - there's no sound coming from the internal speaker. Headphones play just fine. I have tested the speaker itself, and even tried installing a different version of Mac OS hoping it was a software issue. What's weird is that there isn't even a startup chime, so I...
  12. Garrett B

    Cracked chip on 8.24.GC Nubus card.

    C6 looks a little funky... I'd check it out to make sure it isn't shorted. Wouldn't want to have anything blow up the first time you try things out.
  13. Garrett B

    Newly re-discovered Mac SE

    Nice work diagnosing the RAM issues! If it were me, I'd remove the accelerator and make sure the logic board will get you to a flashing floppy disk. That way you know the majority of the logic board is in a working state.
  14. Garrett B

    Mystery IIsi that chimes, but has no video, and won't boot!

    You bring up a good point here. I've done some serial diagnostic work on a Portable but didn't even think to try the IIsi. I know it's supported - just need to figure out syntax for the right tests to run. Unfortunately a lot of this isn't super well documented. I'll post back though when I have...
  15. Garrett B

    Mystery IIsi that chimes, but has no video, and won't boot!

    When you say "video controller chip" you're talking about the RBV chip at UA3?
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