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I Tested 7 Unknown Commodore 64s. How Many Still Work?

Mark Fixes Stuff 30 min Published Aug 2026

About this video

Seven Commodore 64s of unknown condition are put to the test, after the maker builds and calibrates an OpenC64Saver to guard them against a failed 5V supply.

Good to know: Mains voltage inside the old power supply, and capacitors that stay charged after unplugging. Building the protector means soldering: burns and fumes.

Why watch it

Seven named machines, some of which survived a house fire, face one identical test, so the video doubles as a tally of old C64s.

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