Ensure your TV does not turn off during the update process.
after installing an Android 11 firmware on the TCL 50EP660. The bootloader is updated and cryptographically signed. Downgrading requires a serial flash tool (RTD266x programmer) and voids your warranty. firmware tcl 50ep660 upd
Detailed user experiences and file links are cross-verified on regional tech portals like the 4PDA TCL Android TV Forum Thread . Ensure your TV does not turn off during the update process
. Copy the firmware file to the root directory (do not put it in a folder). Plug and Boot: Insert the USB into the TV's USB port. Initiate Update: Option A (Menu): System Update Local Update Option B (Hard Reset): firmware tcl 50ep660 upd