I reviewed your design and it looks fine. The only thing I can think is that you've messed up in the implementation somehow. Left a blob of solder somewhere or something has a bad connection.cargo wrote:Thanks for the reply MarkOZLAD. I didn't do the mux approach because it looked too complicated for me. I would have needed a lot of help and didn't want to impose. I could still try it though.
The Red showing is a great sign. Get your multimeter out and take measurements of continuity and resistance to ground on places on the red circuit and then do the same on green and blue and try look for differences.
As for the mux approach, I'd be more than willing to help. I already had notes on this exact chassis and as I'm not advanced enough in my electronics knowledge yet to know the exact method so I was going to recommend the use of a potentiometer to empirically determine the correct resistor size for the mux.
The mux approach is generally WAY EASIER than OSD Snip to implement. Simple, cleaner and better. Just need to study the chassis and the method a bit and think about where you inject your RGB. Note: I rarely use diodes anymore which makes it dead simple. It really isn't something to be scared of.