Here is a list of possible solutions you can try if your Smart TV is not recognizing your external device:
Ensure that the external device is well-connected and plugged in to your Smart TV.
Ensure that all cables and connectors are in proper working condition and securely attached in the right ports.
Check your Smart TV settings to make sure that the external device is selected as the preferred input source.
Restart your Smart TV and external device and try connecting all the cords again.
If the problem persists, contact the device manufacturer for further assistance.
