: Ensure you have downloaded TCL 48D2740 Firmware.part1.rar through TCL 48D2740 Firmware.part5.rar .
: Format a USB flash drive (8GB or smaller is recommended) to FAT32 . Download TCL 48D2740 Firmware part5 rar
: Use a tool like WinRAR or 7-Zip . Right-click on Part 1 and select "Extract Here." It will automatically pull data from Part 5 and all other segments to create a single .bin or .pkg file. : Ensure you have downloaded TCL 48D2740 Firmware
The "Software Upgrading" screen should appear. Release the button and wait for the process to reach 100%. Right-click on Part 1 and select "Extract Here
: Move the extracted file (usually named MstarUpgrade.bin or similar) directly onto the root of the USB drive (not inside a folder). Update the TV : Turn off the TV and unplug it from the wall. Insert the USB drive into the TV's USB port. Press and hold the Power button on the TV (not the remote). While holding the button, plug the TV back in.
LED TV, you likely need the complete firmware package. Firmware for this model is often hosted in multiple compressed parts (like .rar files) to make downloading easier. Why You Need "Part 5"