Ensure your TV is indeed the 3840x2160 (4K) version. Installing 2K firmware on a 4K panel can result in a "No Display" or "Upside Down" screen.
Copy the extracted firmware file (often named allupgrade_...pkg or similar) directly to the root directory of the USB—do not put it in a folder. The "Power Key" Method: Turn off the TV and unplug it from the wall. Insert the USB drive. Download HV553 3840x2160 part07 rar
Right-click on Part 01 and select "Extract Here" using a tool like WinRAR or 7-Zip. The software will automatically pull data from all parts, including part 07, to create the final .bin or .img file. Installation Guide for TP.HV553 Motherboards Ensure your TV is indeed the 3840x2160 (4K) version
If WinRAR reports a "Checksum error," you can try the "Keep broken files" option in WinRAR settings as a last resort. The "Power Key" Method: Turn off the TV
Press and hold the on the TV panel (not the remote). Plug the TV back in while continuing to hold the button.
How to Download and Install HV553 3840x2160 Part 07 Firmware