Try resoldering the vertical output device, esr all caps in the affected
circuit and change the questionable ones, use a good magnify lamp to find
the broken connections or ring cracks on the board.
"George" wrote in message
news
I have a Zenith SY1324S-01 TV mfd. in May 1997.
The vertical deflection is intermittent. Sometimes the picture is
fine, and sometimes there is just a horizontal line. Before I open the
case, I'd like to know whether anyone:
A. is familiar with this model and knows what the most likely cause
would be for this problem on this specific model,
B. has a schematic,
C. knows how to open the case (which is usually the hardest part of
the job).

To reply directly to me, replace all 'z' with 'a' in email address.