My laptop (AN 515-55-56P) started doing the same thing on 7/18. I've performed the battery removal and holding power button sequence more times than I can count. I've uninstalled and reinstalled drivers. I rolled back Windows and then upgraded to Windows 11. I even bought and installed a new battery with the exact same issue! I used a multimeter to verify that my charger is providing 19.8V and verified that the battery has the indicated 15.4V across its outer pins.
All of this and still no luck!