Samsung — led tv panel problem

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Chennai, Tamil Nadu

We have purchased led tv model ua46d5500rr on aug 18, 2011.from last month onwards screen not working.called customer care they checked and told panel gone have to replace Panel so pay 40000.only three years going to finish without any physical damage and without any problem the panel automatically gone.why won't be the product mistake.we want the panel to be changed free of cost.please do the needful Thanks Kamala