I just went through this. Tech support thought it was a bad color change motor...it turned out that the head wasn't all of the way up. There were little pops when it was moving along, then one big snap and it stuck. I can't tell you exactly what he did, but he loosed the bolts on the color change motor cover, then he reached underneath and rotated a shaft to get it back into the proper head up position. Poof. It worked.