I would like to suggest for these expensive machines out and What was recommended to me when I bought my Longarm was to invest in a really good battery backup surge protector. I believe it is just as an important investment as the machine was. Yeah they are 100.-300.00 but considering how much the machines are, well worth it. I also have my Viking Ruby on it. But just to be sure I still unplug during thunder storms and weather that would cause power outages. I took a class from Viking rep and she recommended the battery backup and had said that a lot of circuit board problems arise from blinking on and off of lights and power outages.