Continue holding until the "Upgrading" or "System Updating" screen appears, then release.

Updating your firmware via a multi-part RAR archive is a specific process often used when standard network updates aren't available. Since you are looking for "part 2," it is critical to ensure you have all parts (usually part 1 and part 2) in the same folder before extraction for the firmware to work correctly. How to Prepare and Install TCL Firmware

If you are using a manual update because the Network Update is failing, follow these steps:

: Ensure you have both part1.rar and part2.rar in the same directory on your computer.

: Do not turn off the TV during this process. It will automatically restart once finished, which may take about 4 minutes. Where to Find Official Firmware

Press and on the TV (not the remote).

While holding the button, plug the TV back into the power outlet.