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Showing results for tags '512k repair'.
I am having issues with my Macintosh 512k. The machine will usually boot with the checkerboard pattern shown in the pictures. Sometimes it will make a very distorted sound on boot. The issue is not with the crt as it has been tested with other boards. Occasionally the checkerboard pattern will change. I suspect the the issue is with the roms installed. I have tried cleaning the roms but this does not change the issue. I am curious if any one else has ever had a problem similar to this.