Im the one who asked the question but I worked out the prob, so this is for anyone refering to this for a similar prob. What it was was a fauty RC solinoid for the standby mode, It kept flicking on and of repeatedly, so quick that the picture didn't dop out but it did interfier with the sound and picture quality (and made a very anoyin clik clik noise) I recomend removing and replacing the solinoid unit which is located on the secondary circut board at the back behind the main board to the left viewing it from behind. What I did was remove the solinoid, pry open the case from the top and inserted a small piece of NON CONDUCTIVE plastic to fix the switch to ON ie coper to coper, that way you can no longer switch the set on/off with the remote but every thing else works fine eg vol, picture mode, chanell select, ect.
Steve
June 2006