My spec as follows 47lw6500 lg using only HDMI cable from cable setup box hrs used 13,400hrs 1st symptom: after 3 yrs my magic remote cursor quit working. then several months after, 2nd symptom the LED screen went off suddenly while I was watching a program, no audio and display, then I unplugged power cable after ten minutes and turn back on again. It comeback on normally sound and display but after 15 minutes of watching the screen goes blank dark again no sound no display. the 2nd time, I repeated the same procedure unplug and replug to no success, even after 24hrs there is no more picture or sound at all. Just power lights turning on doing their normal thing but nothing on display. I had done several flash light test; no picture and also dark room to see any illumination of the at the back of panel; there was no light at all. The front panel power light comes on normally and stays on, also goes off normally after I pressed the power button from remote or direct touch of tv switch to switch off. Only there is no picture or sound. Can you please help? What is the cause of this problem? Can it be fixed by replacing the main board or is it a case of bad LED? Your help is very much appreciated. Thanks
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