Hi everyone,
I have a the machine BOP, the game was 95% working. first time, the game powered up normally, but when I restared it, the cpu did not boot up. after a quick check, I found there was no 5v on the driver. All others voltage were present and good. I switched both cpu and driver into another game, and the game start normally, so cpu and driver are good.
According to the schematic, only connector J101 brings the voltage for the 5v, but how can I mesure the voltage on the connector? and does it really come from the connector, could it have another reason for this porblem? thanks for your help.