Commodore 64 Zero Insertion Force (ZIF) socket mod. C64 Assy 250469 board modified with ZIF sockets for easy IC chip testing. Read more on

The ZIF Socket Mod

Repairing broken Commodore 64’s is usually a matter of qualified guesswork and quite often substitution of chips is the only practical way to diagnose a fault. At least that is the approach I’m using when trying to resurrect broken machines. The challenge with this method is … Read more

Commodore 64 Assy 250469 Rev 4. repait log. Faulty RAM modules, CIA and power switch

Memory Trouble

A black screen Commodore 64C Version E short board (Assy no. 250469 Rev. 4) landed on my workbench a couple of days ago. Everything started out as a simple power switch replacement and memory IC swap, but ended up being a little more complicated than … Read more