Unable to detect my router

I have a Dell Inspiron 9400 with an Intel PRO/Wireless 3945ABG card. I am using a D-Link DI-624 router to create a wireless connection.

The router was working perfectly fine untill I did a PC Restore in my Dell laptop. I am able to access internet using an ethernet cable directly between my cable modem and the laptop. However, when I connect the modem cable to the WAN port in the router the wireless card will not detect the router. Also, if I connect the router to my laptop using a separate ethernet cable the Network connections inside the Control Panel will show both Local Area and Wireless connection as "Not Connected".

I have tried resetting the Modem and the Router but it won't help. I have also spoken to Dell Wireless Support, D-Link support, Comcast support but none of them are able to provide a solution.

While talking to the D-Link support I was resetting the router and after that I found that the Status LED stopped showing up. All other lights (Power, WAN and LAN)come up fine. The Status LED was showing earlier. I tried to reset the router a number of times but the Status LED is still not showing.

Any guess why is it happening and what do I need to do set up a wireless connection using this router.

Thank you,
Rajat