While holding the button, plug the power back in and keep holding for 15 seconds. If the recovery menu appears, select "Wipe Data/Factory Reset." 2. Check Your Connection (For Flashing)
The error message typically indicates a communication failure between a Set-Top Box (STB) and a computer or upgrade tool during a firmware flash or recovery process . It means the BootROM is waiting for a command or acknowledgment (the "get") from the host device but is not receiving any input over the UART (Universal Asynchronous Receiver/Transmitter) interface. Common Causes
The initial, unalterable boot code stored inside the STB's processor has encountered an exception or failed a condition check. While holding the button, plug the power back
Your software might be listening to the wrong computer slot. Open on your Windows computer. Expand the Ports (COM & LPT) section.
: Ensure you are using a cross-line RS232 cable (Null Modem) rather than a straight-through cable, as the RX and TX pins must be swapped for communication to work. It means the BootROM is waiting for a
Follow these sequential steps to diagnose, bypass, or resolve the error. Step 1: Verify and Correct the Serial Wiring
The BootROM is a small piece of read-only memory mask-programmed into the system-on-chip (SoC) during manufacturing. It contains the very first code executed by the processor upon power-up. A BootROM error means the absolute lowest level of the device's boot sequence has failed to progress. Open on your Windows computer
If you see garbled output or no response to commands, the device may not be in the correct mode. For many TV boxes and receivers, entering MaskROM mode requires a physical "shorting" procedure:
| ☐ | Verified UART adapter functions on a known-working device | |☐| Confirmed correct TX→RX wiring with no loose connections | |☐| Tested multiple baud rates (115200, 921600) in serial terminal | |☐| Successfully entered MaskROM/BootROM mode via shorting or reset button | |☐| Installed proper drivers (Amlogic USB Burning Tool drivers v2.1.7/2.2.1 recommended) | |☐| Disabled Windows driver signature enforcement temporarily | |☐| Ran flashing tool as administrator | |☐| Confirmed firmware matches exact device model and SoC version | |☐| Tried alternative USB port (preferably motherboard USB 2.0) and a different cable | |☐| Considered professional flash programmer service as last resort |
sudo stty -F /dev/ttyUSB0 921600 cs8 -cstopb -parenb sudo screen /dev/ttyUSB0 921600