I have many shades of grey Lines on my UN75MU6300FXZC TV. I see another thread on Samsung "Vertical Lines on 75inch q7f" where many people had the same issue but there was no solution even though it was marked as solved. Samsung also closed the thread since it was marked as solved.
I have the latest firmware on my TV and it failed the picture test.
- Vertical Lines on TV
Thank you so much for reaching out! I apologize for the confusion and any inconvenience. However, we do not have the ability to support models outside of the US. There are differences between the US and International firmware, to which we do not have access. If you purchased your device outside of the US, please visit the link below for support in your area.
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.