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Hello there! A friend of mine give me his defect AES to repair. This NEOGEO initially had red screen that I fixed. There was a bad trace between D2 pin RAM chip pin 18 and 68k pin 54. After this fix, I've got a green screen. I've checked all connections between RAM, HC259, LS273 and NEO-B1...

I have a little issue with my MVS 2 slots. The facts : - When I plug a cartridge in slot 1 : game works fine, no problems - When I plug a cartridge in slot 2 : I have verticals lines on screen - When I plug games on both slots (1 and 2) : game on slot 1 work fine, game on slot 2 has...

Simple question : how many memory NeoGeo have ? In fact, tech doc on the internet say 64Kb of work ram and 68Kb of vidéo RAM and 2Kb for z80. OK, it seem logic when I look at the NeoGeo motherboard. But when you look closely there is another memory chip who do not enter in general...

I have a Neogeo AES (mainboard model neo-aes3-4). This Neogeo work fine during several years. But today, it decide to be a bit capricious. My Neogeo don't want boot any game ! No sound, blank screen. No boot. I looked at the mainboard, trace are OK, IC seem good, BIOS is an origianl BIOS and...

Hi all ! I suggest to you a little question. I do not understand how work the audio out on Phantom-1. How the sound out ? By cartridge port ? By cartridge herself ? Cartridge connector on Neogeo AES is carry only data, not analog audio signal ? What the pin who has this audio signal ? I...