I feel like it used to be size, color, and clarity meant more expensive. Now I look at a 500$ 4k TV and a 2000$ 4k TV and I don’t know what the difference is. They can both be smart TVs, be the same size, and have a lot of same advertised features, but what are the subtle unspoken mysteries that justify a huge price gap?
If you’re out of options, it ain’t hard to hunt up a replacement motherboard for $100 or less. I got a 55" TV for $80 like that.
I just threw it away, I was done with it. I definitely should have tried to repair it, but my frustration with all things Vizio made that an unappealing option at the time. The others I just moved to less used areas.