It voids your warranty (which is already expired). Find the white sticker on the main logic board. You are looking for a code like TSUMV59 or V56 or MSD309 . That is your actual TV model.
If you have landed on this page by typing "Daewoo TV firmware download" into a search engine, you are likely in a state of mild desperation. Your screen is probably frozen on a boot logo, stuck in a boot loop, or suffering from a weird HDMI handshake issue. You’ve decided that updating the "brain" of your TV might fix it. daewoo tv firmware download
You are correct. But you are also walking into a labyrinth. It voids your warranty (which is already expired)