In the latest video from the More Fun Making It 2 channel, the host shares a new repair update. They begin by discussing a Commodore 64 labeled “Nightmare,” which had multiple issues, including a bad RAM chip (socketed MT RAM chip at U8, U13, and U25), faulty multiplexers for the RAM (MOS chips U3 and U25), and a malfunctioning hex inverter (U8). After identifying and replacing the problematic components, including repairing the reset line, the machine was fully restored with a successful diagnostic pass. The keyboard, while functional, needed cleaning, which was left to Paul, and the machine was declared ready for sale.
Moving on, the host inspects another Commodore 64 with a black screen issue. Initial inspection revealed that while power was reaching the board, there were problems with the power switch and potentially the capacitors. The thermal camera revealed no abnormal heat, but further diagnostics identified a bad CPU. Swapping the CPU with one from a test machine brought the system back to life.
The restoration process revealed additional faults. A CIA (Complex Interface Adapter) chip and a SID (Sound Interface Device) chip were also defective. The host replaced these components, tested the machine, and ensured all diagnostic tests passed. However, some remaining issues, such as socket wear and additional testing, required attention.
The host reflects on the dwindling supply of replacement chips and the need to prioritize repairs. Machines with the best cases and repair potential were prioritized, while those with significant damage were placed in a waiting pile for future repairs when more chips become available.
Finally, the host discusses the overall progress, noting that two particularly challenging cases remain unresolved and will be revisited in future episodes. With a few days left to finish the repairs and return the machines, the video concludes with thanks to viewers and a promise of more updates in the next installment.
