90's Sega Model1/2/3 games that were made in USA (most of them) also have these caps on the sound amp boards.
Since the boards are single-sided, the leakage can go under the pads and get to the other side of the PCB, corroding it all.
Even if you have a game with working sound it's probably guaranteed you have at least one leaky cap on these boards. Even if you don't see any damage you'll often hear a sizzle and a "burning rubber" sort of smell when you desolder an offending leaking cap.
Pic below of a capped one on the top, and you can see the damage caused by leaking caps on the bottom one. It's rarely this bad and usually just limited to one or two small areas, or if you're lucky it'll just have a dead/low channel and the cap didn't leak much. But still, have seen it this bad a couple times to the point where it's not worth repairing, and it's because of the same Marcon caps.
These are found in standard (non-DX) games like VF1/2/3, Virtua Cop 1&2, Gunblade, LA Machineguns, Ocean Hunter, Star Wars Trilogy UR, Fighting Vipers, Virtua Striker & all Sega drivers like Daytona, Rally, Indy 500, Super GT, etc.
I've done at least 30 of these Sega amps. They're not fun, but it's necessary to do, just like on everything WMS ever made in the 90s. There are a couple minor variations in cap values, but Peter should probably sell a kit for these. If you have one, it needs them replaced.
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