Panasonic — Panasonic panel led-th49es480dx, My tv couldn't start due to some problem

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At-tentoloi,Po-Balaramprasad,Dist-Angul,Odisha,759128

My tv couldn't started due to some problem, so i complained..customer service person came and changed P Board, within a week again started problem..then again they told to changed Mother Board.I changed Mother Board.But after changing Mother Board screen problem Started ..Now Customer Care person telling to change Panel Board..I can not understand how they are doing their service..i am not satisfied their service.They are unable to find main issue on TV..So plz have a look on that..