Neo Geo 4 slot help

Hrvat9

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So I got this board local and it was in storage , dust caked onto it. I cleaned it all up , got some games and plugged everything up and I get nothing. I started checking voltages at the harness to see if I was getting 5volts and by accident I touched the ground with one of the red wires with the multimeter prong and this error popped up on the screen



I also can't re enact that scenario again...the screen just starts blinking or a white screen shows up for a sec with some pixel boxes. It's probably not a good idea to keep shorting the ground and 5v lol. Also my harness is wired for a data east pcb if that helps to determine the problem
 
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You killed some RAM. Which ones, no idea.

Definitely don't try to recreate the issue... That's a really bad idea...

Your harness should be wired for MVS, not something else.
 
Did the battery mod, battery looked super clean without corrosion.
Went over the bottom board and found a couple of iffy traces. Are these considered bad and should be fixed?


 
Check with an ohmeter of there is continuity between the sections that the scratches Cover if there is a break then fix
 
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