If your TV is stuck on the logo or not booting, use the following manual update procedure:

: While holding the button, turn on the AC power switch.

: Copy the extracted firmware file (e.g., allupgrade.bin ) directly to the root directory of the USB drive. Do not put it inside a folder. 3. Installation Guide (V+ Method)

Select to see if a newer version is available for direct download. How to update the software on an Android TV - TCL Support

: Press and hold the Volume Up (V+) button on the TV panel.