I have a 600w dimmer that is tied into two other dimmers that control 8 lights in the kitchen. I have LED lights in all lights as the old dimmer used to get hot when I used 8-65w incandescent bulbs. I made the switch to LEDs about 8 months ago and everything worked fine up until about three days ago. Now, none of the lights dim anymore. They are either on or off. When I try the rocker bar, they are either on or off. When I use the haiku app, same thing --- either on or off. Any ides what is going on? All of the other systems in the house (10 other circuits with HAI dimmers) still work fine.