Re: VIZIO e701i-a3 LFTRNXAP1002583 No video No sound , Just Backlights

I replaced motherboard and no change in symtoms : no pix, no audio, just backlight.
I can see where it could be t-con with no video but no audio also points to motherboard.
So does Vizio tvs have something different that t-con board is interconnected to mainboard circuit that if t-con board goes bad than audio is disconnected ?