Be sure to update the firmware, factory reset (ask samsung how as I will never tell) and then try shopjimmy and see if they concur.
I have a 50inch Samsung 7000 series. I notice vertical black lines while playing Samsung apps like you tube and Netflix... But when I play via HDMI connected to my roku and play Netflix and YouTube, I dont have that issue.. I've done TV resets.. It still persists.. Anybody has any idea how I can correct this?