DIAGNOSIS: This is usually a handshake issue between the TV's network chip and your router, especially on congested 2.4GHz networks. The TV's software can get stuck trying to maintain the connection.
FIX: First, forget your Wi-Fi network on the TV. Go to Settings > Network & Internet > Your network > 'Forget'. Restart your router. Once it's fully back online, reconnect the TV to the network, making sure to enter the password correctly. If you have a dual-band router, connect the TV to the 5GHz band (usually named something like "YourNetwork-5G") for a cleaner, less crowded signal.
IF THAT DIDN'T WORK: The next culprit is often an IP address conflict. In your TV's network settings, switch the IP settings from "DHCP" to "Static" and manually assign an IP address outside your router's normal DHCP range (e.g., if your router gives out addresses like 192.168.1.10 to .100, set the TV to 192.168.1.200).
HEADS UP: If you're still having drops, try moving any wireless speakers, baby monitors, or microwaves farther from the TV. They can interfere with the 2.4GHz signal the TV might be using.