Find the small "Reset" pinhole. It is typically located on the bottom or back panel of the device.
If your TV screen remains black or displays an "Unsupported Resolution" or "No Signal" message despite the box being powered on, it is a handshake error. on your television.
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Here are some potential fixes for common issues with the ZTE ZXV10 B820CA15:
If you need help tailoring these steps to your exact device setup, let me know: Find the small "Reset" pinhole
Do you need help finding the for your specific TV provider? Share public link
If your device displays network errors, buffering issues, or fails to connect to the internet, follow these steps to reset the connection. Switch to a Wired Connection on your television
If you have exhausted these options, your final recourse is to contact your cable operator (e.g., izzi) for a replacement device. Given the device is entering end-of-life in December 2026, many operators will likely offer an upgraded model. Good luck!