Thats sooooooo simple to fix! /s Honestly, cut the wires leading to the antena. If you know that to look for, boom! no more wifi again! And if you dont, boom! No more TV! You always run a risk doing this, if you dont know, ask questions, keep the TV away from electricity for a few days and make shure the larger capacitirs are discharged or it will really hurt or worse. The antenna is usually a piece of scrap metal or the metal around the lcd/led pannel’s frame.