I got an SE/30 for a good deal and it worked when I first got it. After it sat for a couple months I started having issues. It powers on, but I get absolutely nothing on the CRT. No glow on the screen and I do not see a glow on the tube with the halves pulled apart and power it on. I am not sure if it has something to do with the power supply or the tube itself? Can I swap a regular SE power supply for the SE/30? Or for that matter, the screen if required?