Mine died as soon as I purchased it and they sent me a new one. I opened the old one to see if there was some type of fuse. There was no fuse inside or anything that looked like it was damaged or could be replaced. There is a lot of stuff going on inside there. All kinds of boards. Not sure exactly what it is all doing but I do know there are 3 wires going to the cleaner. 30VDC + - and then also one called "command". I am interested if supplying 30VDC (180 watts) without the command line will make the unit run. It is possible all the brains of direction and what functions to perform are controlled by the power supply box, in that case it most likely would not work. Going to start a thread to see if anyone has attempted this.