Last week, I woke up and noticed my wifi was not working. After investigation, my wifi-router, NETGEAR WNDR4500 N900, seem to be in some kind of trouble. The powerled was blinking green and I could not access it anymore.
The blinking green led means that the routers suffers from corrupted firmware, don’t know why this happened.
Anyway the solution in short is to download a firmware package, then upload this to the router via TFTP and after a reboot, the green blinking led will stabilize and all functionality will return. In my case the config was intact, so no harm was done.
In the meantime I also a logged a support call with NETGEAR Support, the morning after, they already responded with via email that “The router is suffering from a corrupted firmware. This cannot be restored so the router has to be exchanged.“
Thanks you Netgear Support, but I consider myself technical enough to go for the self-repair option.