i have the same problem,,,the dealership ordered me a new TV. After reading this string, i would say I need the ground isolator. The toshiba that came with my unit is new, but this is what is very strange to me. When i looked at the back of the tv, it was like crossroads added two audio out jacks to the very bottom of the tv, like a add on. The dvd player sound is awesome, but when i hooked up the wires front he jensen unit to the tv, all i got was cracking noise, with another tv, it worked fine. Im not going to buy a out of pocket isolator if i can't help it. The unit was advertised with surround sound and thats what i want. I think thats fair in my opinion.