"Phil Allison" wrote in message
...

"Smarty"

Sounds like a purity problem. Start by degaussing it.

A purity problem would NOT have black and white looking ok as reported in
the original post nor would it result in explicit color replacements as
reported.

** The set is a 19 inch Sony - so it is a Trinitron type.

I suspect the behaviour is typical of Triniton with a magnetised aperture
grille. The degaussing thermistor may have failed in the set and at the
instant of failure left with a parting blow by magnetising the grille.

The OP can check for this by noting if the usual switch on " bong" noise
still happens.

He can also bring a magnet near ( not touching) the screen and see if that
tends to fix various areas.


Sounds like a color demodulation problem.


** Not likely.


... Phil

I agree with Phil. Thinking back, I also seem to recall problems with the
Trinitron slot mask becoming detached and causing serious purity problems. I
would also dispute that a black and white transmission would not look ok if
it was a purity problem. Back in the day, when I was in the TV trade, I saw
plenty of examples where you would not have noticed a purity error on a
black and white picture unless you knew what you were looking for, but as
soon as a colour picture was up on the screen, it was glaringly obvious.
Although purity errors *are* visible on a black and white picture, often
they appear only as a patch of slightly 'pastel' colouration deviation from
the correct grey.

My first suspicion would definitely be the degaussing posistor. These
commonly cracked and failed at switch on.

Arfa