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JED file is on PLD Archive: https://wiki.pldarchive.co.uk/index.php?title=Golden_Axe

That's the sign of a dead GAL. Was the GAL installed backwards at any point? If so, that's what fried it. Regardless, it should be replaced with a fresh GAL.

The soft power button is fussy and acts up frequently with the original power supplies too. There's details here, along with an app you can run that will tell you if it can detect a problem with your computer's soft power...

Yes, that should work since the Vewlix Diamond's display supports a minimum resolution of 31hkz (640x480), which is what the A1 would scandouble the 15khz Supergun output to. That said, an upscaler like the OSSC would give you a cleaner picture on the Vewlix since you could upscale the...

I've used a PicoPSU with mine. https://github.com/mattsoft/X68K_Pico_PSU_v2

Correct, the Custom SH2 CPU can only run the original games, not modded games.

Glad you pulled that battery before Something Bad Happened.

Can you run the DiagBIOS on it and see if any hardware issues are flagged?

None that I'm aware of.

Sound cutting out after 10 minutes and coming back after the board rests sounds like the amplifier overheating. It should have a heatsink on it - if not, add one. Now that you’re not getting anything but random sounds … that could be a code issue with the Z80. Dump the EPROMs for sound and...

The SMD soldering situation for a potential System 11 Multi reminds me of the Psikyo Multi and the upcoming CV1000 Multi. Sure, desoldering the existing SMD ROMs and attaching something else is a challenge but it's workable for folks with the tools and skills. Installation services could be...

I can program an EPROM with Raiden Fighters Jet US Region for you if you like and sell it to you at my cost. If you're interested, send me a PM.

Check that the signal is reaching your CPS3 first. If you have a multimeter, set it to DC voltage. Place the positive probe inside Player 1 Button 6 (Pin 15) of the CPS3 kickharness connector and the negative probe inside one of the Ground pins on the kickharness connector. Tap Player 1...

Great repair! Enjoy the game!! :thumbsup:

seiiseiiseii2000 on Ebay does excellent reproduction art for cabinets. Send him a PM of what you want - hopefully he can produce it for you.

Corrected! :thumbsup:

I recommend replacing those plastic standoffs with metal ones. Otherwise the underside of the middle PCB can scrape on the top of the Multi daughterboard on the bottom board and cause problems.

Great repair! :thumbsup:

Got a Diamond Black all lined up, so consider this thread closed. Big Thank You of appreciation to everyone who reached out. :thumbsup:

EDIT: The board is likely running either the MAME "outzonecv" ROM set or isn't in MAME at all. I should have dumped it and checked back when it was on my bench! :P The Outzone board is a factory-made conversion from Zero Wing - the TP-015 model code is the give away. I have a video of the...