Broadcom 440x Problem/ Connecting to the internet/ Windows 7/ Inspiron 6400

Hi,

I have a problem with connecting to the internet. I have a Dell Inspiron 6400 laptop, currently out of warranty. My OS is Windows 7 and my battery is dead. I installed windows 7 a couple of months ago and when I connected to my internet cable connection or wireless one , everything worked just fine. But no, I can connect only to the wireless connection. If I plug the cable, nothing happenes on the taskbar, no sign of messages like"cable unplugged/plugged". My network board is a Broadcom 440x Controller. Additionaly, there is no blinking LED where the cable gets in. I tried the same cable in my friends laptop, and in his, the connection works. I have the latest driver and I did not change any properties.

What should I do? Is it a compatibility problem with Win7, or is the dead battery causing this or is the network board just all of a sudden dead?

10x,

Vlad Munteanu