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  1. raygank

    Mac SE FEHD - first checkerboard, now stripes, looking for repair guidance

    It was the analog board! I still need to test a bunch of things, but I recapped the analog board and reflowed all the solder on the various 12v power connectors, and now I'm getting this: Thanks for the help, all! I was sure I was SOL for a while there.
  2. raygank

    Mac SE FEHD - first checkerboard, now stripes, looking for repair guidance

    Thanks. If anyone has any advice or information about how to trace or troubleshoot the 12 V rail I’d really appreciate it.
  3. raygank

    Mac SE FEHD - first checkerboard, now stripes, looking for repair guidance

    Thanks. Reassembled and checked at the floppy connector. 5v seems fine (several pins read 4.9v, one reads 4.6v) but the pins I think should be 12v based on this pinout guide are reading 2.8v. Strangely, the -12v pin seems OK at -11.7v. At PSU (no load) At Floppy Connector 5v 5.3v 4.9v...
  4. raygank

    Mac SE FEHD - first checkerboard, now stripes, looking for repair guidance

    Hi all! First post here, hoping for some advanced help. Thanks in advance! I picked up a Mac SE that I'm trying to get working again. It was initially booting to a checkerboard screen: My first stop was to clean the motherboard (which didn't look too bad) with alcohol, and re-seat the ROMs...
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