39;s probably a backlight or backlight inverter issue if the problem occurs on all sources and the onscreen menus. (The backlight itself usually fades or makes the on-screen image change to pink/red.)
...backlight - even inverter board is good but if this is busted resulting to black picture also. Diagnosing the fault is technical and if you don't have necessary tools and test instrument and ...
...turning on then it's provably your backlight inverter that is bad. If you look at it it has a part number on it that you cna use to order anotherone. You can order it from ...
...39;d check the 24V output for the inverter when the screen gets dark. if you have the 24V there and the screen is dark then the problem is NOT in the power board; in that case it will more likely be ...
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