I am having the same problem. I used be able to punch up the ip in my browser and access the router. But now, any computer fails at that. I even plugged directly and still nothing. I know it is working because I use it for wireless only. It feeds the Qwest modem/router (Qwest modem/router has weak wireless, low coverage) and I do have wireless connection thru it. I just can't access it any longer.
I also tried a reset thinking it would bring things back to factory specs with the factory ip. Still, nothing.
I am thinking a virus killed the access or it is having issues and needs to be sent to service or trashed.
Anyone else experience something similar?