My PJ is showing a green "spot" when it shuts down. I think of a spot as not not moving, so I'm not sure the term really applies here -- the "spot" moves as it fades away. G2 wire is connected, and I double checked the connection point. I purchased another neckboard and swapped it out, but nothing changed. I also checked the heater voltage -- 6.3v. I've been turning down the contrast to turn off the PJ (lower than 30), and so far it doesn't seem to be damaging the tube any.
The image dies the moment the PJ clicks off, and I'm guessing that's the spot kill circuitry kicking in as the retrace stops. Why does the green tube come back on a moment later? Mystery.
Here's what it looks like:
Any idea what might be causing this?
edit: Any possibility this is secondary (cold) emission?