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This is a very common problem caused by poor design of the SCART system which allows cross-channel feedback.
At the TV rental company I worked for we cured it by supplying "cut" SCART leads; usually these leads are completely reversible, but on a cut lead one end is designated only for the TV.
They are commercially available and easily identifiable as one plug will be labelled "TV" and the other as "video" or you can make your own using one of the generic cheap SCART leads which allow you to open the SCART plugs to access the wires:-
Open the plug and identify pin 20. They will have moulded numbers, but pin 20 is the one which is in the angled corner of the plug. The wire should usually be pink, if it is green then check pin 19 which is directly above pin 20. If this wire is pink then cut it. If the pink wire was on 20 then label the plug as being for video/Sky, and if it was on 19 then it's must be labelled for TV. Now do the other plug, whatever the order of the pink and green wires on pins 19 and 20 was on the first plug will be reversed. Cut the pink wire again. If the colours don't match then just cut the wire from pin 20 (video/Sky) at one end and from pin 19 (TV) at the other end.
Reassemble everything and plug it all in correctly and your problem should be fixed.
On a slightly different matter, never waste money on over-expensive "upgraded" SCART leads. They may look good but you're just flushing money down the toilet.
I hope that this has solved your problem, all that I ask in return is for you to take a moment to rate my answer.
sounds like the linear adjustment is out of whack.....most projection type tvs, projection, lcd, plasma, have to be correctly aligned so that the color grids overlap each other to properly display the correct hue being created. you'd need the service code to re-adjust it, or have it serviced. also possible that one of the color grids is bad, but if you have all three (red,blue,green) colors showing on the entire screen area i would doubt it
When this happens the voltages on some of the circuit boards can be adjusted to claer up this problem. THIS IS NOT some thing a person should do them self, the voltages are dangerous and critical to the operation of the set. "This should only be done by a trained service technician."
I had a similar problem where the screen went to a pink shade periodically. Sony sent me a memory stick, with download instructions, that fit into one of the back ports. The problem has gone away. It was a software correction.
If you are using component cables to connect the DVD to the tv make sure you have the red,blue and green colors on your cables matching these colored jacks on the tv and DVD jacks. If one of these cables is plugged in wrong or not plugged in it could cause this. Good Luck
yes it can be down to signal degradation especially via scart lead, make sure you use a decent scart if you buy an expensive one you can tell the difference.
Run a cable from your sky digibox direct to your tv to see if the picture improves.
You'll get this abnormality some times due to the signal if you're watching regular analog picture and you have your TV set on full screen, the TV will stretch the picture and you will see more defects than if you're watching it on normal picture. But if you are seeing the same problem when watching HD picture it needs to be serviced try this link I found: http://www.moniserv.com/doc/lcdtv.html