Phillips 28" Widescreen colour-flickering?

My Phillips 28" Widescreen TV started to go in red nuances for a short while, then go back. But it's getting worse by the day.

Now it keeps flickering between red green and blue in different levels of brightness and contrast. It's almost impossible to watch TV now.

The TV haven't been exposed to any strong magnets or magnets at all and it's only 1½ year old. Is there any chance, that i can mend it myself, and what could this have been caused by?

Thanks in advance.

Henrik Pedersen
Denmark