I believe that consumer grade displays are inherently designed to be replaced vs serviced whenever they go bad. But, if your mind is wired-up to learn more and tinker with things, you can generally figure out a way to prop it open and fix it yourself. I don't know much about your exact LG model but I am pretty sure you could drive it with another more generic controller off AliExpress.com. What makes consumer grade displays a bit more interesting is that they generally come with the audio component. If that wasn't a big concern, you could easily drive it using another generic controller or an LVDS compatible mini-itx motherboard.
I don’t care much about the panel issues - a few dead pixels I can live with and anything worse I’d rather replace it. But everything else should be easily swappable.
Also, I’m assuming you’d at the minimum support HDR and preferably Dolby Vision and Atmos. How easy/hard is that?