Question about LG 32LX1D 32 in. LCD Television

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LG 32" LCD powers on but the screen is Blank.

While viewing a dvd movie the screen flickered & then went blank. the tv turns on but I have to unplug the power cord to turn it off. Also, the power lite is green but the screen remains blank. Would you guess that I also need a power supply or is it a main board problem.

I noticed that when I attempted to change the input from HDMI to VGA the screen acted funny & later that day is when this issue arised.

~Thanks & I await a reply~

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