Technicians often match firmware by the Main Board Number (e.g., TP.MS338.PC821) rather than just the TV model, as manufacturers sometimes change internal hardware during production. How to Use These Files

If you have collected all the necessary parts, follow these standard steps used by technicians on YouTube guides and support forums :

Ensure your TV model exactly matches 43SU128 , 49SU131 , or 55SU134 .

The file you're asking about, , is part of a split-archive firmware update usually intended for specific 4K Smart TV models (often generic or OEM brands like Sony Bravia, TCL, or Skyworth equivalents found in certain regions).

Plug the TV back in. On many models, you must hold the on the TV (not the remote) until a "Software Updating" progress bar appears.

Do not turn off the power until the process reaches 100%. The TV will usually reboot itself. Where to Find Help

Are you trying to fix a specific issue like a or a frozen logo , or are you just looking for a feature update?

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