Mix-and-matched system caches between old and new firmware versions can cause system lag or app crashes. Go to Settings > Device Preferences > Reset > Factory Data Reset to clean the cache.
The TV will scan the USB drive. If it recognizes the file, select to begin the process.
After a successful firmware installation, the first bootup can take anywhere from 5 to 10 minutes. The Android system is rebuilding its app caches during this time.
What improved after update
If your TV is not updating, or if it is stuck on the loading screen, a manual USB update is the most effective way to make the . 1. Preparing the USB Drive
If your TV is not connected to the internet or the network update fails, you can use a USB flash drive.