The service manual is here--   Dell Latitude 3500 Service Manual | Dell US You have to replace the whole palm-rest and KB assembly. Not an easy job. Try adding a usb external keyboard.
Hi there,  I need to change the Keyboard of my Latitude 3500. I can´t find any Tutos to do it. Has someone an idea if possible ? or some helps would be fine. Thanks
Latitude 3500 Keyboard disasembly