Not a real repair but just a quick “dirty” fix for this Konami Teenage Mutant Hero Turtles PCB :
All was fine but the music played at the start of a game (when turtles jump from palace) was missing :
A usual I started my troubleshooting with a visual inspection and I found soon the culprit.One of the two 640KHz ceramic resonator was missing:
I took it from a dead donor board :
and once fitted the missing music was restored.End of (small…) job.