I’m fairly new to manjaro. At the moment I am facing the problem, of not being able to connect to my LAN network.
I have tested it with other OSs and other machines and there it seems to work. However on my machine which has manjaro installed, I am unable to connect to the network. It seems to me that the system might be unable to resolve the dhcp configuration when set to automatic.
And finally, how are you connecting to the network? cable or WIFI? Do you remember anything else that might be relevant? Did the liveISO connect to internet when you installed Manjaro?