@taek8461, 5.5V? Uh-oh! The BeagleBone Black needs 5.0V as the sticker on the barrel plug shows.
Please, re-test with a different microSD card (one that didn’t get hit with 5.5V) with this specific image:
https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Debian_Buster_Console_Snapshot
I have a feeling your going to see the exact same boot pattern, sadly your Board may have taken too much over 5.0V
Regards,