Plug the TV back into the power source while continuing to hold the button.
Ensure the firmware matches your specific panel number (found on the back of the TV). Download TCL L43D2930S Firmware part4 rar
A power cut during flashing can "brick" the motherboard. Plug the TV back into the power source
Right-click Part 1 and select "Extract Here." This will automatically combine all parts into a single folder. Download TCL L43D2930S Firmware part4 rar