Open the back of the TV and verify that the board printed number is exactly CV960XH-A50 .
Flashing the wrong firmware can "brick" your motherboard, turning your TV into a very expensive paperweight.
You cannot extract Part 20 by itself. To successfully "Download CV960XH A50 3840x2160 Magic55 Update," you must:
If your TV brand is listed (e.g., Skyworth, Hisense, or local rebrands), check their official "Support" or "Drivers" page first. Installation Checklist (Don't Skip!)
Different firmware versions may map the buttons differently. Why "Part 20"?
Plug the USB drive into the (usually the white or black one, not the blue 3.0 port).
Download (Part 1 through Part 20) into the same folder.
Right-click and select "Extract Here" using WinRAR or 7-Zip.