Neo Geo 2 slot problem....

[Oni2382]

Whats up everyone? So i have this Neo Geo 2 slot PCB  that has one of the gold plated connectors damaged and has some charring on the solder side of the PCB. The connector coincides with video GRN wire with JAMMA harnesses. Games boot up and work however, the picture is ghostly white.  Is this an easy fix that's a DIY, or will I need to send this off somewhere to get repaired??

[HaRuMaN]

What's on the other side of that charring?  Did something burn up?

[Jack Burton]

Bizarre.  The first thing that comes to mind is to just solder in the connection on that broken edge connector and see if that helps.  It sure isn't supposed to be like that so I guess you will have to fix it anyway.

[Oni2382]

What's on the other side of that charring?  Did something burn up?

From what I could see it's only charred on the solder side. The resistors and everything on the other side look fine. I brought a neo cab, that came with this eboard like this. I brought it with the condition of the PCB unkown since it was missing a power supply. I didn't pay much for the cab so I'm not sweating bullets (yet.)

[CheffoJeffo]

Ick ... FWIW, channelmaniac is my Go-to-guy for all things Neo-Geo.

[channelmaniac]

EEEK!

Something was miswired in the cabinet.

You have some 74LS273 chips and a 74LS05 along with some resistors making up a resistor ladder on the video outputs. Check the resistors and replace any that are open or have drastically changed values. Replace the 74LS05, fix the burnt traces, and then see if you have video output. If you don't, then change the 74LS273 chips.

I can do this for you if you aren't comfortable working on a board. I charge $35 for most non-surface mount Neo-Geo repairs.

And thanks for the pr0pz Cheffo!

[Oni2382]

So today after fiddling around with a few of my machines, I decided to hook up the Neo 2 slot board to my Dynamo cab, and IT works with NO issues...The only thing I did to the board was wipe some of that charred residue from the solder side and thats it. But my question now is why would it work perfectly fine in the Dynamo but have a ghosting image in my 4 slot cabinet? At first I thought the -5V connection in the Dynamo made the difference but I disconnected the wire before I plugged it in....Any thoughts?

[channelmaniac]

Check the video ground connector on the harness for a burnt contact... then check it for continuity from the contact to the monitor.

After that re-cap the monitor.