Flashing the wrong firmware (even if the board number matches but the panel resolution or brand is different) can permanently brick your device. Ensure the file name exactly matches your TV's panel sticker.
Sites like BadCaps or Electroda often host firmware dumps for various TV brands. You may need to search specifically for the 6A358 board model there. Download 6A358 1920x1080 Noa Vision N43LFOS part04 rar
If you are seeking this firmware because your TV is frozen or not responding, some users find a Hard Reset as described in the NOA Vision YouTube guide can resolve issues without a full firmware re-flash. Flashing the wrong firmware (even if the board