I have played a little bit with nvram settings and now what i have is a completly dead unit.
after power on (without holding reset)
-air and pwr led are off
-all other are still on
after power on (with holding reset)
-it is the same s*it
and nothing is blinking, no asus utility is doing anything.
short words: nothing works.
but i still believe that it will work some time because it has to be a software problem. hardware is absolutely fine, nothing is damaged.
please help me with your hints - i have already some kind of a closer relationship with my router and i dont want to lose it ;-)