Flipkart — Delivered damaged or defected tv

I purchased tcl lcd tv from flipkart on jan 6, delivered on jan 7 there was no visible physical damage at tv, jan 9 technician came to install tv upon installation when he switched on tv there was lines on display, technician said it is damaged item so we need to file request for replacement of tv to flipkat, I filled replacement request to flipkart but flipkart refused request and said it is not damaged it is defected so we need to contact tcl to replace tv, tcl also refused request and said flipkart has to exchange because it is damaged, i called several times to tcl and flipkart both denied to replacement of tv. I am in lose without any reason. Both companies denied to replacement