Raspberry Pi 4 not booting after flashing balena

I have reformatted and re-flashed the SD drive, used another SD drive, used another monitor, but there is no output and no connection to the dashboard.

The light on the Raspberry Pi just stays solid red and there is no indication of installation or activity.

Can anyone help?

Hello @musicman22 first of all welcome to the balena community!

What type of connectivity are you using?