Hi,
Could you try these options:
1. In CLI type firstboot , confirm everything right after, and reboot device. (This should initiate full reset).
2. If after the suggestion above it still doesn't work as it supposed to - try doing bootloader reset again (plug off the power socket, hold the reset button and insert power plug while holding the reset button).
3. In this case, you should reach bootloader even if the whole FW is broken, so try until you do it properly.
Please let me know how it goes.
EB.