I'm very sorry to hear that has happened, and I apologize for any inconvenience this may have caused you. In order for me to help you most accurately, please provide the complete model code for this device.
We use TV and External HDMI source frequently. Currently somehow we change default source to Ext. but we would like to use TV as default, not to need to click Source every time we start TV.
How to change default source back to TV?