Hi I have some good news!!!!!
I had the engineer from my local Panny shop here today with the replacement board... It took 40 mins to strip, install and put back together again. He said it was his second install so far and the first was happy!!!
I am also pleased to report that so far all is well, the picture looks sharper and colours seem better, i also have seen no signs of snakes. So far have checked superman returns on BLU-RAY, HD-DVD and SD, no signs.
Sky Hd seems good too although i have only checked on Sky+ stargate sg1, just checking 2010 that was on sci fi channel last night, nothing there either....
So hopefully this is the cure to our problems, i havent noticed anymore fizzing than before and as already stated the picture seems more colourful and sharper... Lets all hope our troubles are far behind us now and we have the best Plasma tv on the market to date!!!!!