RT-AC3100 brick

I think I managed to brick RT-AC3100, it is not getting into recovery mode.
The Power LED stays ON all the time.

I did the normal reset, and also I did RMerlin recommendations:

1) Turn the router off. Unplug all network cables from it.
2) Press the WPS button, and keep it pressed while turning the router on
3) Wait 10 secs, then press the reset button. Now, release the WPS button.
4) Wait 5 secs, then release the reset button

This happened after I tried to migrate from DD-WRT to...

RT-AC3100 brick