Some TCL TVs allow downgrade via the “Secret Menu”: Press Source + 147 on remote → Enable “USB upgrade without check”. This is risky and may void warranty.
, which include technical specifications and software management instructions: Firmware TCL 502
Power off the device. Hold Power + Volume Up until the TCL logo appears. Release the Power button but keep holding Volume Up. Some TCL TVs allow downgrade via the “Secret
This is the most common and safest way to update your device. Firmware TCL 502
(model T432J), TCL provides official resources through their support portal.