ack

I typed everything in the spoiler and then just didn't post it, but my guesses put me on the right track. So I reflowed everything...

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...

Why this gratuitous hatred? What's wrong with you? Does this forum allow such behavior?

I can do that for you if you like. You can either mail me the EPROMs you want flashed if you have some, or you can purchase the EPROMs...

The truth is that the sound has improved quite a bit, mission accomplished.

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.

18 years later and this has been resolved! Terence is my friend and recently gave me this Atomiswave he had in storage. I did much web...

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...