Hi folks i need some help from the electronics pros on a small audio amp for my old lcd tv that sound is too low on the speakers despite to be on the max volume, i know the issue is on the main board , the only solution is to buy a new board but i don't want to shell out 50 bucks for a board . I have seen in Utube some home made audio amps but i'm weary about those projects, i 've seen a audio buit with an STK audio amp ,. I don't have STK4142, i have STK4273, my question if this is not fake and works can i do it with STK4273 instead of STK4142? thanks https://www.youtube.com/watch?v=BcTZS5Y_IxQ