Wow, what an overwhelming response... lol, anyway Yes a poor ground can cause the problems I described. I found that the grounding screw on my ballast was completely stripped inside the ballast box. I found this out when I started it up and saw a little spark travel around the ground. I ended up filing off some of the paint/plastic coating on the feet and used a couple washers and a longer screw and put the ground on the screws that hold the ballast onto the canopy.
Doug
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