65” Sony Bravia smart tv

*read before responding* We have an amazing Sony Bravia 65” smart tv that has worked amazingly…. Until it didn’t. Contacted all the local electronic repair companies/people because we would love to keep it. Seems to be a “backlight” issue. It seems no one can help. We’ve you tubed googled and talked to people how to fix it… but no luck yet. Wondering if someone out there is tech savvy and knows how to replace the “backlight” that seems to be the issue… If not. We would like to sell it as is…. Pls contact for more info!!