Strange pulse of scan lines when powerd up!

Hi
My iPhones been working fine till the past few days, when I hit the wake button there is a second pulse of scan lines border over my screen then faids away! Any ideas?
Also I noticed I'm haveing trouble with buffered video over wifi&3g the phone refusers to buffer enough to keep playing and stops every few seconds!
Any ideas guys? really buggin me and it's Xmas now! Phones running 3.1.2
Carl
Message was edited by: Aibo82

Yeah its a strange fault more noticeable on wallpaper that had a black or dark background! its like a pulse of grey horizontal lines around the edge of the screen then quickly fade inwards!
Anyone have a clue on this?
Cheers

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