If the red LED is flashing rapidly then the device has entered Brute Force Protection Mode. This occurs at the halfway point of consecutive incorrect unlock attempts. This number is programmable; the max (and default setting) is 10 attempts. Follow the steps in the product manual which refer to Brute Force Protection to permit the second half of your remaining unlock PIN entries. Note: if all of the allowed attempts are spent on incorrect PIN entries, the device will assume it’s under brute force attack and perform a crypto-erase, rendering all of the device’s data as indecipherable.
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