Yesterday I received a donation of #Commodore hardware from a childhood friend, including this lightly used #Plus4 in its original box, with perfectly preserved manuals.
@codewiz love it. Is it still alive? If not: check the CPU. If 8501R1, it’s most probably dead. The power brick is also dangerous. You can replace the square power jack on the plus/4 for a C64 one and use a modern C64 PSU.
@root42 The CPU is indeed a 6501R1, with a conspicuous "OK" drawn on it in purple. How do they die?
Anyway, the PSU appears to be broken (I'll post more details on the main thread).
@codewiz the CPUs die because of manufacturing defects IIRC. The R4 CPUs are solid though. And McEs from Italy sells 6502 replacements that work beautifully.