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Does this come with a security chip or does it need one to play certain games?

Looking for a 100% working UMK3 (rev 1.2 preferred)

Awesome man. Really appreciate the input. I searched for these extensively but there seems to be no record of them online anywhere and I knew coming to the forum might help lol Thanks again!

Recently, I purchased a mk2 cab that was repurposed to play sega and namco games and the jamma harness had been sliced with these connectors all over. The one in the photo is for the monitor chassis and I am trying to add a second set of wires in the connector so I can output game to lcd using...

Can’t seem to find out where this chain thing hooks onto?

SOLVED! A 5amp fuse that was for the ac line was blown. Replaced it and got stable power to jamma and everything worked! I don’t even need to power the naomi with atx psu.

Yep and it doesn't help that I am still considered a noob when it comes to troubleshooting jamma wiring in a cab.

Luckily the i/o is ok. I moved the Naomi to another cab running cps2 and works perfectly. I am going to go ahead and gut the bad cab and re wire everything with new parts.

Unplugged the molex from i/o board. Still throws error.

You might be right about the switching psu...I tested (+5) and (+12) terminals on the psu and they were way above that. (+5) was showing little above (+6) and (+12) was showing in the (+16) I was not able to get a reading on the jamma edge tho. Going to try again later by pulling the harness...

Changes the usb cable and still ended up with the error.

Will give that a try.

From jamma harness to switching psu.

Using a capcom I/o

NAOMI board is powered by 200w atx psu and the jamma is powered by arcade psu. As you can see the mobo getting power and boots up but I get the jamma I/o board not found error. I have tried switching out the arcade psu and got the same error. I have played the game in another cab that was...

Cool cool! let us know. I have a cps2 mobo that is missing those low profile brackets.

Look for a Dynamo Showcase Cabinet that can house a 39" crt arcade monitor. I am in VA so my travel will be limited to VA for pick up. Outside of the state, highly prefer shipping. I would also accept reproduction of this big cabinet if anyone does that sort of work. Not sure what to even...

Found the low profile metal ones for the i/o board on ebay but the seller is on crack asking $69 for them https://tinyurl.com/4knb5cm3

Bought it recently for my dynamo hs-5 because the dimensions for mine and a z-back are the same. Turns out it's shorter in length and would fit a dynamo hs-1 instead...or some other z-back that I don't know about. Joystick and buttons have plenty of life left but they do need a little bit of...

SOLUTION: Nothing wrong with wiring. All components functional. The issue was with MAME general input. Needed to map the green and blue wires to player 2, buttons 5 and 6.