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VicisSubsisto t1_ivpeqmm wrote

Color and odor are the least of your concerns with liquid stains on electronics. I'd be more worried about corrosion and contamination on the circuitry.

That said, Retr0bright is hydrogen peroxide based, which means it should work very well on cat urine, which is ammonia based.

Where are the stains? The disc drive will probably be much harder to clean than the motherboard. If the motherboard is dirty, you could try removing the battery and putting it in a dishwasher (sounds crazy but that's actually a thing people do, and apparently it works). There are also spray-on PCB cleaners that are designed not to damage the electronics, but I don't know how well they work on cat pee.

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No_need_for_that99 OP t1_ivpop2o wrote

The stains are all over.
Every corner... the only thing that is untouched, is the inside of the disk tray. Because the cover was closed.

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VicisSubsisto t1_ivq3aq9 wrote

Look up "Dreamcast teardown", open it up and check the rest of the interior. If there's no sign that it got inside, then hopefully you're safe and some Retr0brite should be all you need.

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