philips 26C9-04 horizontal problems

[jpdylon]

Wondering if someone can point me in the right direction.

When the set is cold the horizontal hold is very touchy and will sometimes start tearing. After a couple of minutes the set has a steady picture, but there is a pie crusting problem. The pie crusting effect doesn't get worse or better as the set is left on.

It appears that the horozontal output and driver transistor were replaced, perhaps to try to cure the problem. THe HOT is a philips part 433-2 - which I believe to be an original replacement part. The driver transistor is an NTE198. What was the original supposed to be, and would it have an effect on the pie crusting problem?

Your thoughts, ladies & gentlemen?