Professional software development, amateur BMW tinkering, old arcade game stuff


Konami Hypersports / Hyper Olympic 84 arcade pcb repair

Game booted to garbage on screen. Logic probe showed the CPU was continually being watchdog reset. ROM & RAM are usually the next things to check and was quickly clear the enable pin on the RAM @ G2 was floating/disconnected. This traced back to a Fujitsu LS139 at H13. With that replaced everything worked again.



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