Re: Pye StudioCOLOUR (K35 chassis) No picture / sound
If the TDA 3560 is socketed, it's worth removing and cleaning the pins. This is what usually causes intermittent colour variations - it's possible it's decided to give this new fault as well. Start here, and possibly replace the IC if you've one to hand. I've probably got one if you're stuck. Then it's time to dust off the meter and check for the +12v on the decoder PCB.
Do the brightness and contrast controls do anything? Certainly sounds like it's in the decoder/RGB area, so do double check your work again just in case.
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