Jogging issue fb no help

No fuse that is serviceable in the power supply. Is it not putting out any DC voltage? DC, not AC. They are cheap in both ways. I keep one on the shelf. I’m on my third one. It’s not Langmuir’s fault. They are ALL cheap Chinese junk. It doesn’t matter what one you buy. The one that Jimmy told you about is a direct replacement. You can’t buy a larger one because it won’t fit inside the control box without significant issues. Just because the fan is not on doesn’t mean it’s bad. The fan is temp-controlled from inside the unit.