I have a dell latitude E6540. I go to a customers site each week.
I have had this laptop for about 6 months. I could run off the wireless or connect to the network using a cable - no problems.
The last few weeks I can get on the network using wireless & get to the internet. If I plug in the cable I can get to anything in the network but I loose the internet.
If I am at the hotel I can turn off the wireless - connect the cable and get to the internet.
So I think my nic is working - didn't know if there is a setting I need to change or something the Network Admin needs to look at.
Thanks for your help.