amber light steady, no wifi, reset dysfunctional

Hi Guys,

my trusty old airport extreme did not come back after a restart while I tried to tweak the settings for the bridge / router mode. Now, when i turn it on, it´s the steady amber light, no connection whatsoever and the reset button is not working at all.

I opened the box to see if the reset button was alright and it seems to be ok, physically, with clicking noise and intact solder points.

I don´t want to throw it away, so.. any suggestions what could be the case here?

thanks!