It shouldn't be because of the antenna connection.
actually already tried out all inputs
Click on the 2 highest button at the top left (maybe several times)
In which port is the satellite or cable connection? You have to select it.
Try to do a reset.
Turn everything off, take out the plug and then try again.
If it doesn't work, turn everything off for 30 minutes and try again later
In the second picture you seem to like analog. Go digital. Otherwise turn off the TV, briefly disconnect it from the power supply and then switch it on again.
Um - Netflix doesn't come via antenna. Is not technically possible.