Trinitron Lost Green

[Outland]

This may not be the perfect place for this, but it's pretty close. I recently found my old 2000 Trinitron PC CRT. I hooked it up to the MacBook, and boy was it a great display back in its day. It still is.

I turned it on today after 3 days in service, and green is completely gone. This happened once before on day 2, but then quickly went away. Looks like green has lost a connection somewhere, but where? Jiggling the cable does nothing at both ends. I've never seen something like that happen. Where is green? The entire screen has a blueish tint.

The tube is otherwise healthy as the CRT was used very little.

EDIT: Dang it, I meant red. Here's a photo.