Do you have the (often printed on the green PCB) to double-check this firmware's compatibility? How to Update Your Vizio TV Software
: 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
: Ensure the file is named correctly (usually MstarUpgrade.bin or similar) and that you are using a USB 2.0 port if available. Do you have the (often printed on the
: 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). : Ensure the file is named correctly (usually MstarUpgrade
: Use a USB drive (8GB or smaller is often most compatible) and format it to FAT32 .
The firmware you are looking for, , is specifically designed for the Vios TV49174K