50" TCL MN#le50fhde3010. Blacks out. The tv was working great, had good pic...

50" TCL MN#le50fhde3010. Blacks out. The tv was working great, had good picture. It just started going black but the sound still always works. You can turn the power off with the remote for at least 2-3mins and then back on and picture will come back on and work great for some random period of time and the picture still looks great.

While picture is working you can see back-lights through the back vents, as soon as picture goes out back-lights go out. Holding a flashlight to the screen you can see the tv program dimly still on the screen.

The other odd thing if you disconnect the hdmi cable source and tv on with no signal back-lights stay on and the menus work and the no input warning will bounce around the screen for hours. Anybody have an idea on which board might need replaced?

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