Press and hold the or Channel+ button on the TV itself (not the remote).
Because official firmware for Brandt TVs can be difficult to locate on a central site, users often rely on specialized TV repair forums or community repositories like KazmiElecom or High Tech Info which provide download links for various 43-inch Smart TV models. Download BRANDT BAB43F5SNA Firmware USB part4 rar
Do you need help or identifying the correct USB port for the update? How to update the Samsung TV's firmware using a USB drive Press and hold the or Channel+ button on
If your TV is not starting correctly, you can perform a manual "forced" update using a USB drive: How to update the Samsung TV's firmware using
Plug the TV back into power while continuing to hold the button until the front LED begins to blink or an "Updating" screen appears.