I can say there are two options you can take. If it's under warranty, then it will be fixed free of cost. If it's not then claiming repairs through official channels will cost you 1-2/3 the price of TV itself unless your speakers itself are faulty. Other than that you can go to local TV mechanic repair shops to get it repaired for cheap, but be wary they might change original parts and install counterfeit ones, then assemble it again to make it brand new, and then sell it anywhere like OLX as if it was never repaired through unofficial channels. Same with iPhone, Android and any other electronic machine, you will never know if it's motherboard was unofficially repaired or it was disassembled