| Error Code | Meaning | Solution | | :--- | :--- | :--- | | | Invalid Serial Number | You typed the SN wrong. Copy/paste directly. | | 0x05 | Timeout | The reset code expired. Codes last roughly 10 minutes. Generate a new file and get a new code. | | 0x08 | Firmware Mismatch | Your firmware is too old for the new algorithm. Try downgrading ConfigTool or updating the device firmware via TFTP (advanced). | | 0x12 | Security Lock | You attempted wrong passwords 10+ times. Reboot the device and wait 30 minutes before trying the SN reset again. |

: Once received, enter the code into the Admin Account field on the device.

Include the full serial number, the current system date, and the model number. Turnaround:

Warning: Resetting device passwords can cause downtime and potential loss of access. Only proceed if you own the device or have authorization.