I built 2 Aethers and one had no blue LED's working, and one had no green LED's working. What I did was ohm out between the pins for the constant current drivers and the pad for that particular pin, and found one leg on each driver (same as the LED color that wasn't working in that particular Aether) showing an open, no solder joint. I resoldered those particular legs on the driver chips and the LED's work like a charm. I've attached a picture with the drivers circled with the letter for the color also showing. If only certain colors are not working, I would start at the drivers. One very important thing I learned from soldering these boards, in worrying about putting too much solder paste on the boards, I put too little, I'll know better next time. Hope this helps,
Bill