The firmware itself is the low-level software programmed into the Non-Volatile Memory (NVM) or SPI Flash chip on the board. It contains the instructions that tell the hardware how to power on, how to interpret video signals (HDMI/VGA/AV), and how to communicate with the panel.
Because this firmware originates from unregulated OEM factories, you should treat any Ds.v56rj.bk file with suspicion. Security researchers have found that some leaked .bk files contain: Ds.v56rj.bk Firmware
You want to change the boot logo or default menu language. How to Install the Firmware (USB Flashing Method) The firmware itself is the low-level software programmed