If your TV cannot connect to the internet or an update is not appearing, you can manually install the firmware using a USB drive. Support - Sharp Global
Would you like help identifying your exact region model from the sticker on the back of the TV?
: The update can be performed via Wi-Fi (Settings > Device Preferences > About > System Update) or USB . Manual USB updates are often recommended for units that fail to update over-the-air (OTA) due to server timeouts or authentication errors. Common Issues & Solutions How To Update Sharp TV - Step By Step
Never download executable files (.exe) claiming to update your TV via PC. These are often malware. The Sharp LC-UE630X only accepts firmware via USB in a raw binary format.