The wrench/setup icon on the touch screen of my 10 year old Edge 800 no longer works. All other buttons/corners of the screen work fine, but not the wrench in the lower right hand corner. When I am on a page other than the menu page there is a right-arrow in the lower right corner and the right-arrow (for instance) works just fine when I press that arrow. But when the wrench is in the lower right it does not move me to the set up page.
I have shut down and restarted, I have aupdated software and I have recalibrated the screen and neither of these internventions makes the wrench work.
Any ideas what is wrong? Any ideas what I should do?