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I was able to get it booting.  The following is the error that was causing it to hang.
 
Begin: Running /scripts/local-premount ... Scanning for Btrfs filesystems done. Begin: Will now check root file system ... fsck from util-linux 2.33.1 [/sbin/fsck.ext4 (1) -- /dev/mmcblk0p1] fsck.ext4 -a -C0 /dev/mmcblk0p1 /dev/mmcblk0p1: recovering journal /dev/mmcblk0p1 contains a file system with errors, check forced. /dev/mmcblk0p1: Inode 753 seems to contain garbage. /dev/mmcblk0p1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. (i.e., without -a or -p options) fsck exited with status code 4 done. Failure: File system check of the root filesystem failed The root filesystem on /dev/mmcblk0p1 requires a manual fsck  
I then just ran
fsck.ext4 /dev/mmcblk0p1  
 
After that it ran and booted to OMV on its own.

I have run into this issue multiple times and the process flow is this:
 
Flash image "Armbian_20.11.6_Helios64_buster_current_5.9.14.img" to a micro SD card.
Run through the config (installing OMV with SAMBA)
Kick over to the OMV to configure the share / media so its available on my network
Runs for some time (this last install was running for maybe a few weeks before it triggered a Kernel panic)
Power off.
Power on.
Board boots, hangs on "Starting Kernel..."
 
Is there some trick I am missing to get this thing to actually boot / reboot correctly?
 
Troubleshooting info:
No jumpers are shorted.
I had a similar issue with a previous img as well.