Can somebody help me with my 42inch plasma screen, it has just started to have a problem with what look like slow activating pixals, ie. on any dark parts of the screen, you can see the sparkle for a split secound, they mainley white but also red,blue, and green. the screen is seven moths old and it is a LG42px5d. i have tried to ajust brightness levels but no luck. it does have a great pq, and have spoken to currys about it but they are not that helpful, can any one advise me please.