There are two common ways to initiate the update depending on whether your TV can still boot into the menu.

Press and hold the on the TV panel (not the remote).

: Ensure your TV is indeed 3840x2160 . Installing 4K firmware on a Full HD (1080p) board can cause a permanent black screen or "flipped" display.

Since the firmware is often distributed in multi-part archives (e.g., part01.rar ), you must download all parts to the same folder on your PC before extraction.

Keep holding until you see a "Software Upgrading" progress bar on the screen. during this time.

: Right-click part01.rar and select "Extract Here" using a tool like WinRAR or 7-Zip .

Turn off the TV and unplug it from the power outlet.