My samsung tv model numbe un55ks8000fxza starting showing colored vertical lines and i can't get off the screen. The sound is still playing fine. I can't see anything except lines to get be able to go to the settings screen.
If this happens on all sources, inputs, and the picture test, the TV will need to be serviced. I would be delighted to set that up for you! Can you send me a private message with the serial number? http://bit.ly/2sSxapD
I have the same model and experiencing the same issue. I already PM'd SamsungGill with my model & serial, but wasn't sure if I needed to post in the forum first and then wait for a mod to respond.