Sorry I didn't get notified about replies to this. I did notice one magnet was missing. Glue there but magnet gone. All I had was tape magnet which isn't very strong so that did very little. I may see if I can find a piece of strong magnet that is thin enough but I doubt I do. Another reed switch may be easier
You are right it is normally opened, took it apart and checked. Good thing as SPST N/C axial reed switches are hard to find and 10x the price. I did go through the unit and ensured that it was wired and grounded correctly at least. The unit I have looks quite a bit different internally than all of the videos I saw of people going through and checking their devices. Hot was going through the fuse, unsure about the power switch, I didn't read much about that to be honest.
Dave