Well mtuna10, good job, we are one step closer.
As I suspected, there is a problem with the connection. Your TV is connected to the router, but there is no connection with PC / DNS and internet - Wi-Fi ile internete baglanilamiyor:
In other words, your PC must be connected to Internet while you checking for updates on TV.
BTW
If it's possible, I suggest you connect TV and PC to Internet by wire. I do not know what's wrong with your Wi-Fi, but it's a reason that you can't do downgrade.
I've enough. We made a big mistake buying these LG DumbTV.