Hi there, I used to use my fairly new Dell monitor to switch between my old i7 Bloomfield on HDMI and my i7 Skylake on the mDP, but starting 2016 the monitor displays a lock symbol when I try to switch. Now the Skylake had a Win 10 issue yesterday so perhaps somethings wrong with it tough it does start up, can I do anything else to enable selecting between the 2 PC's again? Having to make my fingers wet with those awkward hidden touch buttons its difficult enough when everything works fine LOL. The display itself looks as good as ever.