Since that's non user serviceable, get estimates.
I got some problems with my Samsung plasma tv. It's approx 4.5 years old and have worked fine until 1 month ago.
I have three devices connected, DVD-player (LG), Digital box (for cable) and media player (Western Digital). The only device that work is the Media player, it works in all HDMI-ports and with different cables. But the other devices wont work, have tried several things. I tried a reset on the tv, i tried to have it unplugged for some hours, I updated the firmwire, different ports and cables.
When I got the DVD and the Box connected and try to use them through the HDMI the picture becomes pink/corny and blue/grey at the top, so the ports "feels" there is something connected.
I contacted the Samsung support and they told be about the steps above and said that they could do no more without sending a support worker over and that would cost as much as buying a new TV.
I got no clue what to do next, please help! Sorry for bad english, it's not my first language.