I tried to connect to rpi4 via ssh (on the first setup) 'cause I have no keyboard. I connected to router via LAN, but router doesn't see it (only orange LED lights). Is it possible to setup Pi without keyboard at all?
I set mine up entirely with ssh.. without any keyboard at all. I made a post about how to.. Maybe it'll help:
I installed Raspbian headless already, but Manjaro can't see LAN connection. The image is correct, I think, and I can see first steps of installation when connected via HDMI to TV, but when connect to router only orange LED lights.
If that's the case, I think you should look into your router settings. Maybe give it a static IP from your router?
You could try to identify your connected devices by installing the
sudo arp-scan -l
If you don't see any rpi connected, something else may be wrong.
Maybe problem with Manjaro 19.12. because I tried 19.10 and all worked out.