If so, you need to replace the upper assembly (the keyboard-palmrest-touchpad is a single unit;  you cannot replace individual parts). [URL] The service manual has the replacement procedure -- the entire system has to come apart to replace the component, so if you're having a shop do the job, expect at least one hour labor charge. [URL]  
I recently sustained water damage to my keyboard. It's been to a PC repair shop where they tore it apart and cleaned it up. Now the keyboard is dead; does not respond to any button except the power button. Is there a way to locate the damage (keyboard or motherboard) before I look into ordering parts? Thanks!
Dell XPS 13 9300 water damage