I'm having problems with pixels lighting randomly, I'm running sandevice E682 first 4 outputs 80 ws2811 pixels, 2nd 3 outputs 100 ws2811 pixels, 4th output unused ,3rd group 1st output 20 ws2811 pixelso and that's it, I have null pixels every 10 feet with no power injection. Running lor software. During songs when nothing is in use random pixels light up. There not at full brightness and just twinkle on and off for a second In no apparent order. Checked the software nothing in the sequence . Changed the board, changed the cable, nothing seems to work. So just wondering if anyone has any ideas on how to fix. By the way I'm running two other e682's with no problem.