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I would double check continuity of d0-d7 between lower backup ram and lower work ram. They should be connected. Its possible whomever replaced the backup ram before damaged a trace.

I believe its just a bug in the game. The same thing happens if you play the game with the US bios in mame.

Not the hinge pins, but any screws holding the hinge to the cabinet.

Have you tried unscrewing the marquee's metal hinge on the top of the cabinet? That is how I got in my 4 slot (non-big red) locked marquee section.

One that has the diag m1 rom installed in it

The diag bios requires a special cart to do the z80 tests.

The forum has been in decline for a number of years now because of it. There seems to be a large chunk of old school users that seem to get off on being assholes. Hard to get/keep new members when people are pricks to them. Why stick around when there are better/more friendly/helpful arcade...

it looks like both ends of the trace end in a via. You could run/solder a bodge wire between those via's

There is a high resolution picture here https://www.mvs-scans.com/images/f/f0/Mv1f_set1_main_bottom.jpg The trace does not go to the cap

what was the fix

verify you dont have hard dip #8 in the 'on' position. I would also verify with a multi-meter you are getting 5V on your 5V rail.

This page should help https://github.com/jwestfall69/neogeo-diag-bios/blob/master/docs/ram.md

The 5814 were the wrong chips to replace in your case. The address you provided is from the 32k vram chips.

Clean the cart slot on your mv1f and clean the cart edge of your game. They may look clean but there can still be a layer of oxidation on them.

Its indicating there is an address line issue with the 2k vrams. Its effecting one or more of the A0 to A7 address lines on the 2k vram chips. There are a number of traces that run near the pins of the 2k vram chips, you probably have a bridged solder joint to one of them.

You can use this for measurements and edge connector https://github.com/jwestfall69/neogeo-diag-mvs-prog

did you try what was suggested?

You have a mismatch between your MV1F and your supergun for audio. You have the MV1F is set to stereo while your supergun is jumpered for mono. Try setting them both to stereo or both to mono and see if it helps.

Is your wiring harness jamma or mvs? In your 3rd picture you have the switch set to stereo which might be causing your problem if you have a jamma harness.

The advice I gave was based on the messages the update diag rom generates, which can be found here https://github.com/jwestfall69/neogeo-diag-bios The message in your picture without having a diag cart is an indication the z80 is working fine. If the z80 was dead you would have gotten Z80...