MVS NEO GEO pcb defect problems

[jugurthabrasil]

Hi Everybody


first this site is very cool , lot things i can learn here seens long time ,thanks for that

well i have lot problems with my Neo Geo PCB

lot of MV1 FZ has Z80 PROBLEM , i read problem can be yamaha sound IC ...remove it and try another ..or Ram8 AFTER
how can be the solution ? i have out of order 8 PCB with this defect problem


i have another FZ i don't have credit , when i put credit the game is on '' insert coin''
do you know where is the problem ?
when i tested on the test mode i saw the contact coin is working but when i try to play i have insert coin

perhaps you have solution


and ...what i can do with graphic PCB defect ? I need to verify what king of composant ? cause i have 4 PCB like that too

total 13 pcb out of order ....chit really

waiting help or explication

thanks

jean

 

[werejag]

i would find someone local to test all your pcbs. rthat many going bad is very strange.

maybe its your cab

 

[FalcomAdol]

Either that, or maybe you want to put your machines on UPS.