I recently bought a UHD tv 65UP75003. I'm not sure, but I think there was a problem after the software upgrade. The TV is connected via an HDMI cable to a DTV receiver that sends 1080i resolution and the problem is in the horizontal line that travels from top to bottom. The line is not visible at progressive resolution. What I did: Reset the TV, receiver, bought a new high speed HDMI cable ...
Please help and what to try next?
https://photos.app.goo.gl/tyjifdpGLFAXmKd88