Hi
A 80inch TV is very impressive,the biggest iv ever seen is about 40
The thing about LCDs or any display panel for that matter is that if the device is old the whole device will be cheep but if you want a part of 80inches that’s going to cost you
Just to put it into perspective for you
You can get a old run of the mill car for £$700 but if you buy a new engin or gearbox for it it may cost more that what the cars worth
So unless you can find a donor TV I can’t really see it being worth it ,especially because of the size of the display and how much the part would be to post
I love saving things but we can’t save them all but that doesn’t mean don’t try because I think if you try hard enough you might come across one with a good display and it might fix your issue
Sorry if it seems I have been rambling,it’s just a little hard to explain these things
Thanks:-)