Faulty DHCP on D-Link DSL-2640U - Factory Reset

With a direct Ethernet connection from the router to my pc I could not access anything on the internet, but the local LAN was fine, I can ping pc A from B and B from A, but neither could see or ping the router and all Wi-Fi devices was working 100%, outgoing traffic, opening router configuration, ect. So I reset the router hoping for the best, thereafter nothing worked.
 
After some fiddling I realised there was no new IP being assigned, so I tried 'ipconfig /release', 'ipconfig /renew' and so forth then resorted to a static IP but still no luck.

 

It was a fairly new router, but figured the DHCP must have somehow broken...

 

Took me over 2 months to find this post, I have bought a new router in the meantime but hopefully it will help someone else. - http://www.expansys.co.za/ft.aspx?k=53282  

Apparently - the router may have gone into crash mode while completing the reset.
 

1. Remove all cables from the router except for the power cable. Leave the power cable connected. 
2. Get into a position in which you can be holding the reset button and have your other hand free. 
3. Press and hold down the reset button. Hold this for 15 secs. Then remove the power from the router. When you remove the power continue holding down the reset button for another 30 secs.  
4. Plug the power back into the router - still holding down the reset button. Wait for another 45 secs and then let go of the reset button.  
5. Finally, wait for 10 secs and then remove the power again. Keep the router unplugged for 60 secs, then plug it back in. 

Happy days !!!!!!!
You should now be able to connect to the configuration menu on the router.