the tv keeps disconnecting from my wifi, have to reboot it to get it back

Diagnosis

The Vizio V505-J09 V-Series suffers from a common stability issue where the internal wireless network interface card (NIC) enters a "sleep" or "hang" state, failing to request a new IP address from the DHCP server once the initial lease expires. This manifests as the TV showing it is connected to the network, but failing to load any streaming content, or completely dropping the SSID from its known list until a full power cycle clears the volatile memory of the network chip. This is frequently exacerbated by "band steering" on modern dual-band routers. The V-Series hardware often struggles when a router tries to force the TV to switch between the 2.4GHz and 5GHz bands dynamically. When the router pushes the TV to a different frequency to balance network load, the Vizio handshake fails, causing the connection to drop and requiring a reboot to re-establish the handshake. You can confirm this by checking if the disconnects happen more frequently during peak household internet usage or when other high-bandwidth devices are active.

How to Fix It

To resolve the handshake failure and clear the network cache, follow this precise sequence to perform a "Hard Network Reset":

1. Power down the TV and physically unplug the power cord from the wall outlet. Leave it unplugged for exactly 60 seconds to ensure the capacitors on the mainboard are fully discharged.
2. While the TV is unplugged, unplug your wireless router for 30 seconds, then plug the router back in and wait for it to fully boot (until the internet LED is solid).
3. Plug the TV back in and power it on.
4. Press the Menu button on your remote and navigate to Network.
5. Select Manual Setup and find your current Wi-Fi SSID. Select it and choose Forget.
6. Return to the Network menu and select Wireless Setup.
7. Select your network from the list. When prompted for the password, enter it carefully.
8. Once connected, navigate to Network > Network Status and verify that you have a valid IP address (e.g., 192.168.1.XX) and that the DNS is showing as "Connected."

If That Didn't Work

• Assign a Static IP Address: Log into your router's admin panel (usually 192.168.0.1 or 192.168.1.1) and locate the DHCP Reservation table. Find the Vizio TV by its MAC address and assign it a permanent static IP. This prevents the TV from losing its connection when the router tries to rotate IP addresses.
• Split Your Wi-Fi Bands: Disable "Smart Connect" or "Band Steering" in your router settings. Create two separate SSIDs (e.g., "Home_Wifi_2.4" and "Home_Wifi_5"). Connect the Vizio TV specifically to the 2.4GHz band. While 5GHz is faster, 2.4GHz is significantly more stable through walls and less prone to the "drop-outs" seen on the V505-J09.
• Change the Wireless Channel: Use a Wi-Fi analyzer app to see which channels are congested. In your router settings, change the 2.4GHz channel from "Auto" to a fixed channel—specifically 1, 6, or 11. This eliminates interference from neighboring networks that often triggers the Vizio NIC to reset.
• Bypass Wireless with Ethernet: If the TV is within 50 feet of the router, use a Cat6 Ethernet cable. The V-Series hardware is notoriously unstable on Wi-Fi, but the physical LAN port provides a rock-solid connection that bypasses the failing wireless adapter entirely.

Heads Up

• Avoid placing the TV directly against a metal wall or inside a tight recessed cabinet, as this shields the internal antenna and increases signal attenuation, leading to more frequent disconnects.
• Ensure your TV firmware is updated. Navigate to Menu > System > Check for Updates; Vizio frequently releases patches that specifically address wireless driver stability.
• If you use a VPN on your router, disable it for the TV's IP address. The Vizio OS often rejects VPN tunnels, which can look like a Wi-Fi disconnection.
• Avoid using "Guest Networks" for the TV, as these often have aggressive timeout settings that kick idle devices off the network faster than standard private networks.