I just noticed this on the 7JP4 CRT! It was missing a pin. I looked in the CRT connector and there it was. It looks like the solder connection failed. The connector came off the CRT pretty easily when I took out the CRT.
I'm thinking of soldering the pin back in place then using a bit of JB Weld to glue it down. I'll also touch up all the other pins on the CRT with my soldering iron.