Chosen Solution
This started at first with one line, but now it has two. The lines don’t go all the way across the TV, they stop halfway. I have a 4K UHD HISENSE ROKU TV WITH HDR (2019) 50" Class - R6 Series Model: 50R6E1.
Hi, @lala05 Were you able to find a solution for this problem? I’m having the same problem here: black thin lines:
A bad cable, or a cable that is not securely fastened to the input/output ports, can disrupt the signal and cause horizontal or vertical lines. Verify that the cable in use is secured correctly at both the external device and the TV. If you knock on the back of the TV, the vertical colored lines MAY disappear temporarily. This is a sign that a cable is loose or the T-Con board is faulty.
