Since this is a specific "dump" file (usually meant for SPI Flash programming rather than standard USB updates), it is often shared on technical repair platforms:

Turn on the TV. The standby light (LED) should start blinking rapidly, indicating the update is in progress.

If you are using a "Dump" file for a programmer (like the RT809F), you will need to desolder the SPI Flash chip (usually a 25Q32 or 25Q64) and flash it using the programmer software.