Arkanoid Colors Looking weird.

[tacokitten]

What is going on with this arkanoid board? Any leads much appreciated. Cap it? Voltage?
It has a very old school pinout that sure isnt jamma.

https://www.mikesarcade.com/cgi-bin/spies.cgi?action=url&type=pinout&page=Taito_Classic.html

 

[twistedsymphony]

Caps and voltage likely wouldn't cause those kinds of issues. Most likely a graphics or pallet ROM, or some of the supporting logic.

There are 3 graphics chips (23, 24 and 25) and 3 color proms (IC22, IC23, and IC24) I'd start by dumping those and making sure they're good.