the wifi on my tcl s-class keeps dropping every few minutes, have to restart the tv to get it back.

Diagnosis

The intermittent Wi-Fi connectivity on the TCL 43S446 S-Class is typically caused by a failure in the Roku OS power management handshake between the internal wireless network interface controller (NIC) and the system's standby mode. When the TV enters a low-power state or a background process triggers a power-save event, the network chip enters a "deep sleep" mode from which it cannot wake up without a full system reboot. This results in the "No Internet Connection" error despite the router being fully operational. Furthermore, this specific model often struggles with "channel hopping" on dual-band routers. If your router is set to "Auto" for channel selection, it may switch to a DFS (Dynamic Frequency Selection) channel or a higher 5GHz band that the TCL wireless chip cannot maintain a stable lock on. This manifests as a connection that works for 5-10 minutes before dropping abruptly as the TV loses synchronization with the router's frequency shift.

How to Fix It

To resolve the power-cycling issue and stabilize the connection, follow these precise steps to disable the problematic power-save features and refresh the network stack:

1. Using the Roku remote, press the Home button and navigate to Settings.
2. Select System, then navigate to Power.
3. Locate the Fast TV Start option and toggle this to OFF. This forces the TV to perform a cold boot of the network hardware every time it is powered on, clearing the cache and resetting the NIC.
4. Navigate back to the main Settings menu and select Network.
5. Select Set up connection and choose Wireless.
6. Choose Forget this network for your current Wi-Fi SSID.
7. Perform a "System Restart" by going to Settings > System > Power > System Restart.
8. Once the TV reboots, return to Network > Set up connection and re-enter your Wi-Fi password to establish a fresh handshake with the router.

If That Didn't Work

If the drops continue after disabling Fast TV Start, the issue is likely environmental or router-based rather than software-based:

• Force a Static 5GHz Channel: Access your router's admin panel via a web browser. Change the 5GHz wireless channel from "Auto" to a fixed channel between 36 and 48. The TCL S-Class often loses connection when the router jumps to channels above 100 (DFS channels), which are legally required to be vacated if radar is detected.
• Disable "Smart Connect" or Band Steering: Many modern routers merge the 2.4GHz and 5GHz bands into one SSID. The TCL 43S446 often "bounces" between these two bands, causing a momentary drop. Rename your 5GHz band to something distinct (e.g., "HomeWifi_5G") and connect the TV exclusively to that band.
• Assign a Static IP Address: Use the router's DHCP reservation table to assign a permanent IP address to the TV's MAC address. This prevents the connection from dropping when the router attempts to renew the TV's IP lease every few hours.
• Hardware Bypass: If the internal wireless chip is physically failing (a known issue in some early S-Class batches), bypass the Wi-Fi entirely by using a Cat6 Ethernet cable plugged directly into the LAN port on the back of the TV.

Heads Up

• Avoid placing the TV directly against a metal wall or inside a tight wooden cabinet, as the internal Wi-Fi antenna is located near the bottom bezel and can be easily shielded.
• If you are using a Wi-Fi extender, ensure the TV is connected to the extender and not the main router, as "roaming" between the two will cause the connection to drop every few minutes.
• Keep the TV firmware updated by going to Settings > System > System Update; TCL frequently releases stability patches for the Roku OS network stack.
• If the TV is located more than 20 feet from the router with two or more walls in between, the 5GHz band may be too weak; switch to the 2.4GHz band for better penetration, even if the speed is lower.