Alan B. Pearce wrote:
>
> >This is usually caused by the flyback transformer
> >windings or ferrite loosening up due to heat and
> >stress causing high frequency vibration or a
> >possible arcing.

> I have yet to come across a unit where the problem has been a mechanically
> loose component.


I've fixed hundreds of them. :o) We used to keep a
little bottle of "crazy glue" on the bench specifically
for that purpose.

Many of the TVs use a small inductor, multi winding,
in the Horiz deflection circuit. These often vibrate
until the ferrite C core cracks and then they make quite
a nasty noise. Normally fixed by unsoldering the part,
dousing in glue, dry etc, then replace in the set.
No performance penalties, and much cheaper than the
replacement part which was priced quite high.

The diagnosis was by pushing the part with a screwdriver
with the set running, and the squealing stopped.
-Roman

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