Try these steps to troubleshoot the issue:

1. Check the connection cables for any signs of physical damage from the Smart TV to the source device.


2. Make sure all the cables are connected correctly and securely.


3. Try the device on another HDMI port if switching randomly only happens on one port.


4. Check the television settings to see if there is a switch mode setting that is causing the inputs to switch randomly.


5. Make sure the TV’s firmware is up to date.


6. Unplug the TV from power, then plug it back in after 30 seconds.