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Just to wrap this up, a NOS PRO-B0 chip fixed up my problem completely.

As I said in my original post I inspected and reflowed all three chips in question, sadly didn't help. I replaced the PRO-B0 chip with one from another board, which did fix the graphics faults but now I'm getting Z80 fault, and I actually noticed a physical crack in the replacement PRO-B0. So I...

Diagnostic passes all tests.

Hi all, Wow I haven't posted here in a long time. Anyway, I have an MV-4F I got on eBay untested. It's mostly working except for the dots in the sprite/background layers, but only on the right side. I have a multiple top boards so I'm sure it's a problem on the bottom board. Reading around, I...

Paid for Garou, just waiting for you info so I can send a shipping label! Excited to own this one. BTW first deal I've done on neo-geo.com in like 10+ years?

This is a leak about 2 hours early... https://www.wallpaper.com/lifestyle/analogue-pocket-vintage-handheld-game-boy GB/GBC/GBA plus NGPC, Game Gear, Lynx. Edit official site: https://www.analogue.co/pocket/ $200... 1600x1440 screen?!?! Built in synthesizer?!?!?! Extra FPGA for modders to add...

Hi guys, I'm having some weird trouble with my MVS-1FZ. It was working pretty well except for a few issues when the Bust-A-Move logo scales during in the intro, but I chalked it up to a possible boot cartridge. Today it's acting very strange, the Neo Geo logo doesn't really flip properly...

Hi! I'm looking for a dump of a GAL from a relatively common SF2'CE board, this is the single board with "DASH-X" written on most of the ROMs. The one I need is the GAL16V8 near the top of the board, to the left of some bigger GALs. I'm pretty sure this is what is making my sprites invisible...

Hi folks, Having some trouble bringing up a Liquid Kids PCB. When it boots, I get a "COIN ERROR" screen then reset loop. Typically this would be a stuck coin switch or whatever, but (1) I'm running it on my own tester which I'm confident is working and (2) I have tested the coin switch input...

Hi guys, I've got a Double Dragon PCB that I just got working again after a few repairs. However the sync is a little wacky and checking the signal shows a wavering reference due to interference or bad caps. I'm going to go to town on the capacitors anyway, but one of the damaged parts on the...

Hi guys, I'm fixing up an F-1 Dream PCB. After replacing a few 74x chips that were bad, I was poking around the 68K when I shorted the reset pin and the game came right up. Did some more testing and found that when I apply power, the 68K starts up in /HALT until I reset it via the /RESET pin...

Hi again, Switched out most of the electro caps and no change. I have noticed that if I touch a few places on the daughter board (like the '04 chip on the far left) there's a ton of interference that crops up. Is there anything on the daughter board that is known to fail? Another few clues...

Hi again, I'm checking out with a scope and what I'm seeing is a blip of about 20mV every 10 or 15ms. This is present on the audio AND on the 5V line. I've tried two power supplies (a big 10A power supply I bought on eBay and a computer PSU) and I get the same blip. However, I have noticed that...

Hi guys, I'm working on a NEO-AES revision board. I wanted to get line level stereo so I tapped the audio before it gets mixed to mono, sent that to a TL074 in a similar method as the original mono amplifier. So it works great until I connect RGB back up (which I have on a minidin connector)...

Hi guys, Picked up a cheap WEGA CRT (KV-27FS120). Using the 240p test suite (amazing!) I set up most of the geometry, however I can't seem to fix the last few issues. Basically, I can't get the top of screen right. It bows in a weird way (the grid bows out towards the top of the screen ever so...

Hi, Finally got a PVM, a little 1341. My problem is that with RGB, my picture is shifted to the right by enough that it's annoying. I've done all the adjustments inside but H-Centering is a little weird. There's a sub-board (QD) that has two horizontal centering knobs, one internal and one...

Hi! Thought it was time to start a new thread as the old one was a few pages long. I am now producing entirely new PCBs for SNES cartridges. They support all LOROM and HIROM games, which is pretty much anything without a special chip in it (ie, Star Ocean, Starfox 2 not supported). Each SNES...

Hi! Looking for an MV-1C and an MV-1B. No other board will do. Shipping will be to Canada. Thanks!

Hi! Does anyone have a high res photo of the MV-1C board without the plastic shroud on it? Thanks

Hi! Looking to get a Neo Geo home console with a joystick and hopefully a game (don't really care which right now). I'm in Canada so you have to be prepared to ship it up to me. Happy to pay paypal or trade for SNES reproductions which I make (check the Everything Else section). Thanks