sucks to hear man. do you have your system bios on arcade or aes mode? make sure its on arcade amd press select to add more credits
wish I could help with answering your other questions.
The bios says console at startup. I assume that's AES. His do you change the setting? This thing came with no instructions lol
yep, its in aes mode. when you first turn the system, when the neo geo bios screen pops up, press a, b, c and start at the same time which will take you to the main bios menu, the first option will be change region set up, from there it will as you to select region. you can press a for japan b for u.s. or c for euro
Then it'll ask you to choose system mode, you can press a for arcade or b for aes. make sure to press a for arcade for the unlimited credits