I have a JVC 27" early to mid nineties AV-(oops forgot).

It had a vertical collapse problem, and then with help from this group
(especially "Wizard") I fixed that.

Now, it does this thing where it loses blue, except for a dark purple
haze on the extreme left. If you smack it, it will go away and the color
will be prefect, but then the horizontal kinda quivers back and forth,
especially with white edges. Livable but annoying.

I have to assume that whatever the same loose connection or defective
component is controlling both of these behaviors? They do not happen at
the same time.

Inspection/testing of the CRT neck board showed no defective components
and no loose solders (thats where I looked for the color problem)

Jungle IC? ideas?

Thanks alot, Mike