Flashing could help. Do you need guidance for it? If yes, stick around and you will probably. There are guides here on the forum https://wiki.maemo.org/Resurrect_your_N9 as well as here https://www.dt.iki.fi/nokia-n9-resurrect but if unsure you can wait for help. If you use telegram go to: https://t.me/linuxmobile_world