Introduction I purchased this untested Commodore 64 from a local friend. I was not surprised to find that it booted to a back screen. On the plus side, the machine was clean and in good condition. I detail the repair below along with some comments about a mistake I made.
Read postCase Studies in Retro Computer Repair (#9): Diagnosing and Fixing a Commodore 64 with Intermittent Black Screen and Nonworking Keyboard by Reflowing Cold Solder Joints
Disclosure: Note that as an eBay Partner Network Affiliate, I may earn from qualifying purchases. Introduction This Commodore 64 with a 250407 Revision B board came in a lot six nonworking computers that I purchased from eBay. This one seemed to boot but was flaky and would sometimes crash or
Read postCase Studies in Retro Computer Repair (#6): Diagnosing and Fixing a Commodore 64 with a Nonworking Socket
Disclosure: Note that as an eBay Partner Network Affiliate, I may earn from qualifying purchases. Introduction This Commodore 64 (250407 Revision A board with 8-pin video din connector) came to me in an eBay lot of six labeled not working. However, it was able to boot and passed all the
Read postCase Studies in Retro Computer Repair (#5): Diagnosing and Fixing a Commodore 64 with Broken Traces
Disclosure: Note that as an eBay Partner Network Affiliate, I may earn from qualifying purchases. Introduction I purchased this nice 250407 Revision C motherboard as part of a lot of boards. It was missing the PLA (U17) and the VIC-II video chip (U19) as shown below. A new GAL-PLA (e.g.
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