As requested by @rohbotics, I’m creating a new thread on this topic. To summarize the issue:
I downloaded this Raspberry Pi image from here:
I burned the image to a 32GB μSD card and tried the following:
I could not get the Ubiquity “2020-02-10” image to boot on Raspberry Pi 4B 4GB Model connected to a monitor on my desk, ie not plugged-in to the Magni. The screen remains blank.
Next, I tried booting the same 32GB μSD card with the Ubiquity “2020-02-10” image on a Raspberry Pi 3B. Works fine. No issues.
Next, we happened to have have a Raspberry Pi 4B 2GB Model and it boots just fine!
Finally, to convince myself that there was nothing wrong with my Raspberry Pi 4B 4GB Model, I inserted a μSD card with the stock Ubuntu 18.0.4 LTS distro for Raspberry Pi 4B model and it boots and I can login and use it just fine.
Hope that helps. Thanks -Ravi