I've try to upgrade my pi to newest version of the system yesterday, but FAILED for both apt-get upgrade or by download and write the newest image. Here is my working log:
1. apt-upgrade from armbian 5.14 image
- error message indicate there's error during the apt-get update process
- reboot, the boot screen shows no bootup message, than begin the TFTP startup process
- wait until TFTP timeout, the system halt.
2. download and write the newest **Armbian_5.20_Bananapipro_Ubuntu_xenial_4.7.3.7z**
- can be startup with the boot screen, both power led and disk io led (green led) work as expected
- system halt after a few second, the power led goes off
- can power on the pi by long press the power button, but as same as the first boot, powered off a few seconds after power on
- the message goes too fast, can't see what exact stage it reach
Right now, I've to go back to the last working image (Armbian_5.14_Bananapipro_Ubuntu_xenial_4.6.2).