Hey hi ***[link|https://www.ifixit.com/User/4532607/zyro|zyro|new_window=true]***, the only thing I can suggest you at this point is a hard reset.
***To do a hard reset, following the given steps:***
1) Shutdown your phone
2) Put it in recovery mode (I assume you know it because you saved you tried putting it in recovery mode)
3) Wipe data or just do a factory reset
4) Reboot the system
If Hard reset also does not work then it might be just software update, also try charging the battery for a while (irrespective of it showing a sign of charging or no, just put in the cable, turn on the charger and take it back off after 20mins)before attempting a hard reset.
Thank you for reading and have a gorgeous day =)