Issue: Your TV disconnects from Wi-Fi or fails to detect the network.
Fix:
Restart your router and your Vizio TV.
Move your TV closer to the Wi-Fi router.
Use the 5GHz band if your router supports dual-band Wi-Fi.
Re-enter your Wi-Fi password carefully (check case sensitivity).
If possible, connect using an Ethernet cable for stable setup for vizio.com/setup.