This often happens if the STB wasn't powered on at the exact moment the tool requested it. Restart the process and time the power-on carefully.
The tool should now show a progress bar indicating "Initializing" followed by "Downloading." stb upgrade tool ver 4.0 2
This guide covers everything you need to know about using this specific version to flash firmware and recover your device. What is STB Upgrade Tool Ver 4.0.2? This often happens if the STB wasn't powered
Do not touch the cable or turn off the power while the progress bar is moving. 5. Completion stb upgrade tool ver 4.0 2
Immediately the power to your Set-Top Box.