: Use a USB drive (8GB or smaller is often most compatible) and format it to FAT32 .
: Look for the exact filename MS3458 U801 3840x2160 Vios TV49174K.rar on specialized electronics forums or firmware repositories.
: The TV will usually restart automatically once the process is 100% complete. Troubleshooting Tips Download MS3458 U801 3840x2160 Vios TV49174K rar
Do you have the (often printed on the green PCB) to double-check this firmware's compatibility? How to Update Your Vizio TV Software
The firmware you are looking for, , is specifically designed for the Vios TV49174K : Use a USB drive (8GB or smaller
: Use a tool like WinRAR or 7-Zip to extract the .bin file from the .rar archive. Place the extracted file directly into the root directory of the USB drive—do not put it inside a folder. Step 2: Installation Process Power Down : Unplug the TV from the power outlet. Insert USB : Plug the USB drive into the TV's USB port.
(and compatible models using the same motherboard). This update is typically used to fix "stuck on logo" issues or system crashes. Troubleshooting Tips Do you have the (often printed
: Ensure the file is named correctly (usually MstarUpgrade.bin or similar) and that you are using a USB 2.0 port if available.