Forget trying to swap tubes with a different model - unless you want to see
how much equipment you can wreck in one day.

You didn't give enough information for a diagnosis. It could be something as
simple as a purity error due to a magnetic field from something like a
speaker, or if you relocated the set. It could be an electronic fault in
the colour decoding or display circuitry, or a tuner fault.

Also, if it's an older set, the high value resistors on the tube base PCBs
of Sony TVs tend to drift off value and cause lousy pictures - replace them
with metal film ones instead of carbon.

Let's hear more about the fault and the diagnostic tests done thus far.


"Wdyorchid" wrote in message
...
Trinitron (kv-27ts20) appears to have lost it's green because I can see
only
purple, pale pictures. The problem occurred during a hot scorching day when
it
became intermittent then permanent. Is it the tube or the circuit board? I
like to use a test jig tube to find out. I have two 17" Trinitron in the
basement and I'm trying to hook them as a test jig.

The problems are simple. Can this be done if the subject tube does not
appear
to be an exact connection match? If so, how many wires jump from one tube to
the other? Four? (Red, Green, Blue and Ground.) Or do I just plug em all in
to
the other tube as close to on the labeling as possible. What are possible
side
effects?

Example:
Tube one (kv-27ts20) contains about nine pins.
Tube two (kv-xxxx) contains about seven pins.
Tube three (kv-xxx) contains about seven pins.