1. Until today it used to start fine but after running for about half-an-hour a fluctuating pinkish tint used to appear on the screen. Tapping of chassis appeared to reproduce and fluctuate this effect. The tint used to vanish when the TV is turned off for about 10 or so minutes.
Today I did not turned the TV off and the picture turned pinkish, then greenish before finally covering the screen permanently with pinkish purple colour with thin horizontal zigzag strips.
Any clue if it recoverable and how?
2. When it used to work OK (before appearance of pinkish flares) a dispersed yellow vertical strip on right hand side (denser near the edge) and a dispersed blue strip on the left-hand side (denser on near the edge) were noticeable. This effect was not that prominent and was light enough to go unnoticed.