Hi, it is for sure factory reseted, as we’re working with Mikrotics for a long time. You let go of reset button while main light is flashing. It does.
After a bit more research, it seems to be a bootloop after update (even tho we don’t remember updating the Mikrotik). http://forum.mikrotik.com/t/chateau-5g-boot-loop-netinstall-not-working/151624/4
And the same, we’re having the problem that Mikrotik is not showing up in Winbox or netinstall, neither versions that were menitoned in the post up… We don’t know whats up with this mikrotik, this kind of bugs in OSes shouldn’t happen 