Hi there,I have the exact same problem. My touch screen stopped working a couple days ago. All my devices are apparently up to date however the touch screen doesn't respond. I failed all the Dell online diagnostic tests for the touchscreen too and have sent them an email (currently out of office hours).Did you have any luck?
I have the same exact problem with my 5638. Happened in June. I wonder if an update killed the display. I wonder if Dell is going to acknowledge this.
How did you fix the problem, or did you?