So having a very weird issue on a Stern Pirates.
Game wont set to freeplay at all, also when i add credit all the display says is "Insert Coins".
Volume is at Full, But i cant turn it down. There also is no sound, just speaker hum and sometimes a weird noise.

I would love to Repair this board, just have no idea what chip/chips could be the problem. Maybe Ram?
Sound i guess could be u16 from my research. but i am unable to even play the game at this point.

I have updated the code to latest and it did not change anything, battery is also fine.
Its a crazy Expensive board so i hope someone can shed some light. thanks

I have uploaded a video of the problems.

if its the optos causing this i would be surprised but then again ive seen some weird stuff in my time...
i was figuring a memory cut off switch could be the issue, but i dont think sam system uses that, unless im mistaken.

i will have to check what country the game is set to. probably usa on the jumpers but ive messed with that before just to rule it out and didnt change a thing.

Well good news its fixed. It was indeed a problem with the 12 volt. Never would have figured that could be the issue.

I tested 12 volt on the test point of the power supply it was there, but when i tested 12 volt on the connector going to the cpu board nothing.

So i took out the power supply and there was a broken trace, from what i recall a very thin one on the solder side of the board going to the bridge, after i fixed the broken trace the game worked fine.

thanks again, i really figured it was a cpu board problem