Hi Chris
Sorry, yes it is a plasma, philips model S42 SD-YBOS and on the panel it has:- Model 107 FP4/10 made 15-07-2004.
I have not been well and have finally decided to look at it, from what I remember the problem started only after it had been on sometime but over a few weeks it got to where the picture was bad on switch on.
I have it set up with a Wii through scart and the picture is still as though there was a bad aerial feed.
Kind regards
Gazza.