Why is the CRT taking longer to light up?

[dieseljeep]

Originally Posted by Magnavox300

What I mean is the display is taking a longer time than normal.
No light at all on the screen... then it pops on.
It is sudden, not gradual.

Look at the chassis with the back removed, in a darkened area. Take notice if the horizontal output and the damper tube is lighting properly, as well as the CRT. Also, make sure the horizontal output isn't red-plating, indicating the horizontal oscillator, isn't starting up, as fast as it should.