I have a "ONIHAMA BAKUSOU GURENTAI" Pachislo machine, but the graphics are not working. It's stuck on the loading image with glitchy horizontal lines.

I tried cleaning, re-seating the memory modules and even pressing them down in case of wonky contacts but it doesnt help.
The audio/music is still working. The board is a Sanyo agb1k2.

Is there anything to fix this, do i need a reflow or find a replacement videochip? (I don't have experience with that)

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I hope there is a fix for this, because finding a new board would be even more difficult right?