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Thanks mac128, the plus turned up today and it's in an even worse state than the 512k! Floppy won't read, keyboard doesn't work and the raster was quite jumpy. I Pulled it apart to find a very burnt looking pin on both sides of the J1 connector and burn marks on the corresponding joint on the...

Hi I just received a Mac plus from Ebay. My plan is to replace my slightly dodgy 512k's Analog board with the one from the Plus until I have the time to do the necessary repairs on the 512k board. Are these boards interchangeable? Cheers!

Thanks mac128. Guess I just have to practice my soldering skills on some scrap boards and do the recap. I'm relieved that you don't seem to think this is a problem related to the flyback transformer.

I recently bought a Mac 512k with the 800K disk drive upgrade from Ebay and I had a few questions for the fine folks here. I thought at first it had some bad joints because the raster would sometimes go to a thin vertical line until I slapped the side. I took the back off to find one of the...