You cannot fix this with a remote control or by plugging in a USB drive alone. Because the bootloader is corrupted, the device cannot read USBs or SD cards on its own. You need to speak directly to the processor.
You will need:
NAND and eMMC chips have a limited lifespan. If the boot partition has developed bad blocks or the chip has experienced power loss during a write operation, the BootROM cannot read the bootloader. The device falls back to UART recovery. bootrom error wait for get please check stb uart receive hot
To fix the issue, you must understand what the device is telling you: You cannot fix this with a remote control
Translation: The device cannot find an operating system to start. It is crying out for a computer to send it a new system image via a hardwired connection. Translation: The device cannot find an operating system
Host (TX) → Target (RX)
Host (RX) ← Target (TX)
Host (GND) → Target (GND)