Fatal exception with factory reset on PA-200 PAN-OS 6.1.16 and later
If you see the issue on your firewall, please try to the following steps to resolve it.
Step 1. Type in "other" during the count down steps.
Step 2. Select "Disk image.
Step 3. Select "Revert to X.X.X" , a version of PAN-OS that is not 6.1.x.
Step 4. Select "Reboot."
If you cannot enter maintenance mode with using the "other" option, there is no other option to recover the system. You will need to contact support to request assistance in recovering the system, which will more than likely be an RMA of the unit.