Also... that full discharge may have toasted your battery, so I would have it properly load tested after it has been fully recharged. That is the only way to tell if your battery is still up to spec or not.
If it still tests good on specs, then it still benefits from a periodic full saturation charge with a smart battery charger/maintainer, as this can help modestly restore any plate damage from a full discharge, or persistent low charge (which does prematurely kill starter batteries).
Flooded cell starter batteries do not like to get depleted. Unlike Marine/RV batteries, the plates are not designed for deep cycling and can be damaged by one or more full discharges. The industry says a brand new flooded cell starter battery can take up to 12 full discharges over it's life.... BUT... that presupposes a brand new fully charged battery that meets all specs under a load test and has no internal defects. Frankly... a battery that is a couple years+ old is not up to the task.
Ok, tried that and got a different outcome. Radio still works. The display now reads: In Line Diag. M-bcan OK, Duet: OK, GA-Net: OK, Camera: OK, Result: NG. Still no camera and the setup button doesn't work. Ever seen that screen? It's not in the owners manual.
Charged it overnight. Next I'm going to try leaving the battery unhooked for at least an hour. The screen shown by "ilovemyhonda..." is much fancier than what I have. It's my moms car and the cheap one with steel wheels, no extras. Yes, I admit trying many combinations of buttons trying to reset the display.