[quote author=“Drachen”]It’s a hardware problem. I’ve seen it on IBM laptops every once in a while. Usually what I did was push the eraser head the opposite way a bit and it stopped. Unfortunately, you’ll probably have to get Sony to replace the part having the problem. On the IBMs, it was usually the motherboard that had to be replaced.
My X does it as does my U. All nipple tips will do it for whatever reason. Unlike the IBMs which u can push it till it stops, this doesn’t work for the Sony’s…just sit back, watch it move for a few seconds, and it goes away.
Erik