how can i fix my TV's screen colour?

I hope the replacement fuse was the correct value. Anyway it sounds like the screen is magnetised. This can be caused by having speakers nearbye or a power dip but in most cases if the set is switched off at the mains completely (not standbye) and after at least an hour it should return to normal when power restored. If this fails to cure the problem then you will have a faulty degaussing thermistor within the set.
As a temporary cure it can be demagnetised using a demagnetising wand or (not sure if this works) an electric drill (mains not battery) placed near the screen and slowly backed away. It would be the electromagnetic coils within the drill that would be hoping to cancel the magnetism on your screen. The television can be switched on when doing this to observe the coloured blotches appearing and then disappearing as it works. Hope this helps.

Tony
January 2008