Hi - we've just got a brand new Samsung c450 42" plasma. Its been okay for about 5 days, but tonight approximately 7 or 8 white and coloured lines have appeared vertically on the right side of the screen. Any ideas please? I'll be gutted if this is a donkey! Cheers.

If it's a new TV take it back! There is a problem with either the PDP or the Y Buffer board. If it's still under warranty, call Samsung and have them fix it.

If not, are the lines pink? If they are clustered in 1 or more strips (usually about 3 in apiece), the Y Buffers are starting to go bad. Do not watch the TV - it may cause more damage and blow the YSUS board if this is the case! Replace the affected Y Buffer, and the lines will go away. I had to replace the upper buffer in my Samsung HPR4272X/XAA (my [3] strips were horizontal, and on the upper half of the TV).

If its the Panel, there is not much you can do about it (at least in my experience) except replace the panel. At that point in time, it's more cost effective to get a new TV.

Good luck!