I downloaded the latest manjaro (kde) OS, checked the hash and it was fine.
I used Etcher to create a live pendrive, which is running well on my pc (using free drivers).
I installed the OS to my hard drive (successful) and see the manjaro splash screen, the welcome window, and a box telling me that the internet is unavailable.
A black background is seen and no desktop. I tried with another kernel, but observed the same black background and no desktop.
From the pendrive I used mhwd -li -d and noted that the video driver is the free driver (video-linux: standard open source driver).
Can anyone suggest where I might be going wrong?