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  1. gibsonpil

    Macintosh 512k - Troubleshooting degraded/non-existent sync signal.

    Hi. I have been working on fixing up an old Macintosh 512k for a while now (as of now I've cleaned up the exterior and completed a full recap of all of the boards), but I've hit something of a dead end. According to my oscilloscope, the HSYNC and VSYNC signals coming off of the motherboard seem...