I have a Samsung TV Model - LH75BETHLGFXG0 which is connected in a classroom with a scaler with a PC input. When I manually Select Source on the remote and choose HDMI1 it works and shows the PC. (The TV does say source unknown).
The above fix (Pressing Source to HDMI1) does work.
However if the TV gets turned off it will bring up the menu and tell me to choose a source. So if a non technical person uses the room they are unable to turn the tv's on because they dont know what to press.
How can I force it to HDMI1 all the time and nothing else?