After verifying ownership and completing troubleshooting, a DELL agent setup service to replace the keyboard.
I have a Latitude 5520 less than 1 year old. S key black coloring has come off exposing large white dot. Dell will not correct the issue even though it is still in warranty period. There are other posts with the same issue. Is there anything I can do to have Dell stand behind their product? 
Latitude 5520 Keyboard Chipping