Chosen Solution

My TV wasn’t listed in the drop down so I picked the closest one. The real model is un65mu6290f. The right half of the screen is washed out. If I do a little…uh percussive maintenance on the back right side it works again for some time but will go back. Any ideas? Hope the picture goes through I’m on mobile. https://imgur.com/vbXAK8H

Ryan Feeney that is a tough one based on the half screen situation. It is possible that this is a bad T-con board or just bad wiring. the washed out appearance is usually caused by T-con boards but should be across the whole screen. Take the back off your TV and check the boards. Look for anything odd like charred, lost or otherwise. well. odd. Post some pictures of what you see with your QUESTION. That way we can see what you see. You just have to edit your QUERSTION and use this guide Adding images to an existing question Check the wiring. Remove all the cables and reinstall them. Check for tears, corrosion etc. The percussive maintenance could affect loose component or cold solder joints. Suspects on this are main board, T-Con board and yes, bad panel.

Hi @Ryan Feeney Try adjusting the backlight dimming setting and see if this alters anything. Go to Menu → Picture → Backlight and vary level (0 – 20)If no backlight changes observed: Check the Panel Connector pin voltages and BLU_PWM voltages (CNM801) while changing backlight level.If Panel voltages don’t change, and BLU_PWM changes, replace SMPS.If BLU_PWM doesn’t change replace Main/T-Con Board Update (10/18/2022) Hi , I’m a bit concerned that you can change things by using the “percussion test” as usually board problems aren’t affected by doing this unless it is a loose connection. Here’s an image that shows how to test the backlights independent of the main board. If the backlights are still dim in sections of the screen the problem is either the power board or the backlights or the connections between them. Turn off the TV, disconnect the power to the TV and then follow the direction to remove the cable between the mainboard and the power board. Reconnect the power to the TV and check the backlights. Also see if they alter brightness. when using the percussion test. They should be full on and stay on.

(click on image)