Please follow the suggested steps as below and you could choose one of them to adjust the setting of input sources.

1. Hot key - Input Select

2. OSD - Input Select: Press this to change the input to that appropriate to your video cable connection type.

3. OSD - HDMI auto switch: The default setting is off, and you can turn it as on.

When this function is activated, HDMI or HDMI / MHL port will be in the input auto select loop. Otherwise, HDMI or HDMI / MHL can only be selected by input select.