I took tv to chennai last year, but I didn't show the bill. The customs officers having a price chart based on that they were charged. No bribe or negotiation worked. For sony and LG it costs more. Price depends on size of the tv and model(full hd ,UHD,smart).
I took 40"sony smart and paid tax around 10500, my friend took LG full hd 40" full Hd costs around 7500. If u prove its a used tv then they may reduce price. Still visit visa I'm not sure. Good luck