Question about LG 42LG30 42 in. LCD HDTV

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Telly will not switch on, blue light comes on for 3 secs than goes to red..

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The problem you have described is called protection fault. When an overload is detected on one of the lines the tv will be shutdown to prevent damage. The cause of the failure is usually component level(resistor, voltage regulator IC etc.,) and the location is power supply board. You may want to take the assistance of a qualified tech to resolve this problem, as its not a good idea to work on high voltage electronics without prior experience.

Posted on Nov 07, 2010

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Posted on Jan 02, 2017

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Open following link for specific illustrations:
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