(and compatible models using the same motherboard). This update is typically used to fix "stuck on logo" issues or system crashes.
: The TV will usually restart automatically once the process is 100% complete. Troubleshooting Tips Download MS3458 U801 3840x2160 Vios TV49174K rar
: 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. (and compatible models using the same motherboard)
: 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. Troubleshooting Tips : Once the standby light begins
: 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).
: 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.
Do you have the (often printed on the green PCB) to double-check this firmware's compatibility? How to Update Your Vizio TV Software