We have 8 15ch Shehds lights. One random started cutting out the green color. Another fixture started dropping the white color as if they were shorting out. We replaced the two fixtures, and now two other fixtures are strobing and dropping out the color white. It's not electrical. When I checked the fixtures that were shorting out individually out of the DMX network it works perfectly fine. Just to make sure I opened up a brand new file with no fixtures patched and test it out the channels for the fixtures that were flashing. It made no difference.