John-Del wrote:
Adjustments don't fix defective\failing components.

The smps for the convergence amp board is shutting down. It could be
the smps itself, or it's detecting excessive current draw from a defect
on the amp board (which could be drawing too much current because of
bad inputs from the correction generator section.

Have it checked professionally.

John

Couldn't it also be loss of color sync? In the olden days (vacuum
tubes, etc) this was much more common.

H. R.(Bob) Hofmann