I have a approx. 2 year old Bush TV (its a CRT (if that means not plasma/LCD)) and for some reason the colours have swapped over.
I put it on to watch the football at the weekend and the pitch was blue and Everton were planying in red (highly amusing as a Liverpool fan!) The picture quality is perfect, it just seems like the TV is confused. In the days since, the colours have swapped round again after it went back to normal once. Took it apart last night and dusted the inside and it went back to normal but I don't think it will last.