While holding the button, plug the TV back into the power outlet.
To download the firmware for the (often listed as LED43D2930), you generally need the USB update file specific to its chassis, which is typically the TP.MS6308.PB775 . This model is often serviced through third-party technical forums or Telegram communities rather than direct public links on the official TCL global site. Firmware Details Model: TCL L43D2930S / LED43D2930 Main Board / Chassis: TP.MS6308.PB775 Download TCL L43D2930S Firmware part1 rar
Do not turn off the TV or remove the USB during the update, as this can "brick" the motherboard. While holding the button, plug the TV back
Press and on the TV (not the remote).
If you have the firmware file (e.g., extracted from "part1.rar"), follow these steps to flash it: While holding the button