Is the battery flat?
Try plugging into the official OEM charger and waiting a few hour for it to boot up and start charging normally. Yes, it may take a few hours for the battery to "wake up" again.
Don't push any buttons or switch chargers or do anything to disrupt the process. If it boots it will still show a low battery %. Let it get to 100% before taking it off the charger.
I'd wait 8 hours before giving up on the charger approach.
Let us know how it works.