Re: Studio XPS 1640 multimedia keys/buttons above keyboard not working.
This just happened to me too. If you hold a flashlight to the side, you can barely make out the symbols for all the functions except the wireless. Try gently touching the area just to the right of the "Studio XPS" logo, moving a little further to the right each time. You'll hit the sweet spot that will toggle your wireless back on. I'm still searching for a solution to get those lights back on. Good luck to us!