Use this if the "Network Update" says you’re up to date but you’ve found a newer version online, or if your TV is stuck in a boot loop. How to update the software on an Android TV - TCL Support

Turn off the TV and insert the USB drive into the TV's USB port. Press and hold the physical power button on the TV (usually located on the back or bottom center).

Release the button once the update screen or a blinking LED appears; the update will proceed automatically. Maintenance Tips

: Download the correct firmware for the 55C2US model from the TCL Global Support page (if available) and copy it to the root directory of the USB drive (not inside a folder).

: If a new version is found, follow the prompts to download and install. The TV will restart automatically once finished. Method 2: USB Update (Manual)

The TV screen went black, and a progress bar appeared, indicating that the update was in progress. John checked his phone to see if there were any notifications, but there weren't any. He went back to watching TV, keeping an eye on the progress bar.