LG Plasma Problem

[AWM1974]

Right, here goes........

I have an LG 60PG30FD (1080p). I've only had it 6 months and from day one, I've had a problem with translucent lines appearing 2 or 3 times scrolling from top to middle of the screen every time I play a blu ray disc. I've tried it with two different PS3's and different HDMI cables. With a DVD I get random blocking and on normal TV, a fine horitzontal line in the centre of the screen. Unfortunately, there is no pattern as to timing. Sometimes it can be an hour before the fault happens and it's only on screen for a few seconds. Both LG and repairer haven't got a clue!!!!

I also have another LG HD plasma (720) and have had no problems in the two years I've been using this one.

I've even posted a 7 second clip on you tube (http://www.youtube.com/watch?v=4aJdsF_GRAo) but have no takers to date.

Please help!!!!!!!!!!