"derek" wrote in message
...
On Fri, 27 Feb 2004 18:16:59 GMT,
(Paul Simon) wrote:

Sony KV-M2511U

FAULT
After switching on, the picture has a green hue. This disappears after a
few minutes. Often, the picture is normal after switching on.

COMMENTS
The TV is probably 12 to 14 years old, so we've had good use from it, but
I was wondering whether this fault might lead to a complete failure in
the
future or further steady deterioration.

Also, does anyone (a TV engineer maybe) have a diagnosis for the fault
described and know whether it would be worth repairing.

Thanks in appreciation of your replies.
Paul


Well, not really possible to say from the symptoms you've described.

But, :-)

If the picture gradually returns to normal as the set warms up it may
indicate a low output red gun in the tube (which can't match the
green), this would be consistent with the age of the set. A cure would
be a replacement tube. Probably not economic or practical.

If the fault suddenly clears after a few minutes it could be a flaky
component or soldered joint/bad connection. The component may or may
not be cheap but diagnosing which one is defective is likely to take a
lot of expensive time.

All in all the recommendation is get what use out of it you can whilst
it is still serviceable.

BTW I don't think it's magnetised as MR Doki suggests. If the green
hue is even over the whole screen, not causing "rainbow type fringes"
this diagnosis may be regarded as definite.

DG

Most likely an ageing thermistor on the degaussing coils which is heating up
too slowly. Simple component to change costing about £1 - although being
Sony that will probably be more like a tenner!


--

Woody