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: Performing a factory reset on certain high-end models (MBD/FIM) can accidentally remove the image file, leading to boot failures that require manual re-imaging as detailed in this Fortinet Community Technical Tip .
: Reboot the device and press any key when prompted to interrupt the boot process. open boot device failed fortigate
Set up a TFTP server on your laptop and place the correct FortiOS .out image in the root directory. : Performing a factory reset on certain high-end
Troubleshooting "Open Boot Device Failed" on FortiGate The error typically occurs when a FortiGate unit cannot detect its internal flash memory or find a bootable firmware image . This can be caused by file system corruption, a failed firmware upgrade, or physical hardware failure of the storage media. Immediate Recovery Steps Troubleshooting "Open Boot Device Failed" on FortiGate The
, or will you need to reconfigure the firewall from scratch once the firmware is reloaded? Open boot device failed, TFTP troubles (FGT60B)
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