A question for anyone who has performed a switchless mod on a Sega Saturn:
is the stock power LED on the (PAL) Sega Saturn a 3 colour LED, or just a regular one? Is a 3 colour LED a part I'd need to buy to attempt the mod?
I was reading up on how to do this mod (here) and it wasn't explicitly clear.
After a bit of thought it then occured to me that I don't actually know for how long 3 colour LEDs are used in consoles. - if it weren't for the RRoD on YLoD on Xbox 360s and PS3s I probably wouldn't think that any unmodded consoles used 3 colour LEDs.
No hurry on an answer for this, I'm a long way off from understanding a lot of the instructions, let alone having the skills to do 'em.
From the article you linked to (page 1)
I believe that answers your question. Why would you need to exchange the power-LED if it was already a dual-color? Dual color (Red/Green), not tri-color, because mixing green + red light makes yellow/orange.
Also, as a complement to the guide from Seb, see this mmmonkey page
Cheers. Brain no function to comprehend electronics or logic so well during small hours of morning.