Ive got a samsung and has it for around 2 years and never had any problems with it until this week.
When i watch satellite hd through my HDMI cable its completly fine, but when i put my PS3 on through my HDMI cable it starts to flicker. Ive changed HDMI cables and also use all 4 HDMI ports but still flickers. I also had an Xbox on my TV yesterday through the scart lead and after 20 mins or so it started to flicker again.
Ive changed all my settings on PS3 but with the xbox doing it through the scart lead i know its not that.
The only thing that i could think it is that the power lead is faulty because my cat has tried to chew through the lead, could that cause this? but i can watch TV without any flickering just when i put on games consoles???
Thanks for any help...

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic