If your TV cannot connect to the internet or requires a "hard reset" to fix a boot loop, a manual USB update is the most effective solution. Preparation Soniq t.v. not working properly - Tom's Guide Forum
This means you won’t find it via a simple “Check for updates” button in many cases. soniq tv update firmware exclusive
The latest firmware update for Soniq TVs brings a host of exciting features and improvements, including: If your TV cannot connect to the internet
Only download from sources where multiple users have confirmed the file works. A wrong firmware (e.g., putting a 50-inch firmware on a 65-inch panel) will hard-brick your TV. soniq tv update firmware exclusive