Disclosure: Note that as an eBay Partner Network Affiliate, I may earn from qualifying purchases. Introduction I purchased this very nice Commodore 64 off eBay. It was listed as not working and sold for parts. It has a clean 250407 Revision B board and boots to a garbled screen as
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 (#3): Diagnosing and Fixing a Commodore 64 with No Power
Disclosure: Note that as an eBay Partner Network Affiliate, I may earn from qualifying purchases. Introduction I purchased this Commodore 64 with a 250435 board (1984) for $50 at VCF SoCal in 2025. The seller had it labeled as non-working with no information as to the symptoms. I was a
Read postPurchase Contact Cleaner for Reseating Chips and Cleaning Contacts on Retro Computer Circuit Boards (5-10 mins)
Task: Purchase Contact Cleaner for Reseating Chips and Cleaning Contacts on Retro Computer Circuit Boards Needed: Contact Cleaner Time: 5-10 minutes Introduction I have been posting about tools and technology that can be used to assist with the repair of non-working retro computers. For example, I recently posted about purchasing
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