And you can get to the routers page at all?
Try doing a 30-30-30 reset?
Let me see if I can find the info on this.
If this doesn't work, Hmm...Well, I would do this, if you can't get to the routers page at all from any PC with any cabling, possible the unit needs work. I would either return the unit to place of purchase if you have this option, if not, I would recommend that you phone in to D-Link support, don't email. Please phone. Tell them everything that you have done up to this point and ask for an RMA.
I think you've done all you can. I can't think of anything else to try.
If you've ensured connections and different PCs and can't get to the routers web page.