Samsung LE40B554 source problem



Hi Everyone!
I just bought LE40B554 TV and have problems with everything but scart :(.
PC input doesnt work, also every of 4 hdmi ports and component. I tried it only with my pc and Polish hdtv "N platform". When i put hdmi cable into tv there is text "mode not supported" or somethimes there is audio but without picture. With component or PC input(d sub and hdmi) same thing.
I think the only way is to get it to service.
Anyone's got any idea what it could be?
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