Yeah, that's the problem with the large screen televisions nowadays; the LED panel is the majority of the cost in a TV and we've found that a) it's rare that you can even find a replacement panel to buy, and b) even if you do, the cost is almost always more than the original price of the TV itself, so we've yet to see it be cost effective to replace one.
So yeah, you can part it out for the boards inside; those are valuable on the market, but unfortunately that's about it for the value of your TV; it's simply not worth it to repair.