You need the specific firmware .img file for your exact TV box model.

. It indicates that the STB is waiting for a signal via the serial (UART/RS232) port but isn't receiving it. Common Causes and Fixes Incorrect COM Port Settings

A single pulse on the oscilloscope. Clean. Square. Digital.

Some BootROMs require a key press (e.g., Ctrl+C , Enter , or custom byte sequence) during power-up.

: The "wait for get" state often requires the box to be powered on at a specific moment—usually right after hitting "Start" on the PC software—to catch the handshake signal. Hardware Interference

If your device says "bootrom error" but you have a USB OTG port:

If you want, tell me the device model and any serial log lines you captured and I’ll provide a tailored recovery sequence.