looks like the latest Update for my OnePlus 9 Pro did bricked my device.
It vibrates repidly at bootup, that stopes when I have the SIM Pin Screen. After I entered the Pins I should get the Finger Print Lock Screen but it just startes to vibrating rapidly again and I get the Line with emergency Call under it to enter the password (no finger print screen). No Keyboard to enter the PW and screen turns black after a while but keeps vibrating rapidly even for hours.
I can hold Power button and restart or shutdown.
So I think it is bricked and I have to try a Factory Reset.
I can enter the recovery menu with VolDown+Power (only reset device and no clear cache option) and the EDL Mode VolUp+VolDown+Power.
Is there any chance to Backup my files in one of that modes?
Use MSM to backup USERDATA partition, I doubt it will work though since it's likely encrypted. If you want to try this, open up MSM, press F8, select userdata, type "oneplus" as password and then click readback button.