: Press and hold the Power button on the TV (not the remote) and plug the TV back into the power outlet while still holding the button.
: Once the standby light begins to flash rapidly or an "Upgrading" screen appears, release the button. Do not turn off the TV during this process. Download MS3458 U801 3840x2160 Vios TV49174K rar
: Use a USB drive (8GB or smaller is often most compatible) and format it to FAT32 . : Press and hold the Power button on
The firmware you are looking for, , is specifically designed for the Vios TV49174K : Use a USB drive (8GB or smaller
: Ensure the file is named correctly (usually MstarUpgrade.bin or similar) and that you are using a USB 2.0 port if available.
: If your TV is still functional and connected to the internet, you can try checking for updates through Settings > Admin & Privacy > Check for Updates (menu layouts vary by brand/region).