So I'm trying to get this SP3 to replace my laptop, hence I want to connect at least one external display. Because I want to use my monitor's full 2560x1440 resolution, a MiniDisplayPort to HDMI won't cut it, so I got a MiniDisplayPort to full size DisplayPort cable. (I checked the PS store for an official cable, but they don't do one, and the 'Live Chat with a person -who failed the Voight Kampff test - recommended that any Mini-Full DP cable would work). Once the cable is connected, nothing happens. Accessing 'Screen Resolution' and/or using WIN-P to Extend the desktop results in a listed Display 2: Display Device on: VGA with 1280x720 resolution, and the monitor (a Dell U2713HM - which the DisplayPort definitely works on with my old laptop) sees nothing. It seems identical to the issue posted here http://www.surfaceforums.net/threads/displayport-monitor-not-extending-on-surface-pro-2.8605/ with regard to the SP2, where at least one user reported failure after an update in April. Device Manager assures me the drivers for the Intel HD Graphics 4400 are up-to-date, and I attempted to install the Dell Monitor driver, which refused as it could not detect the monitor. I have identified that if I choose to update the driver 'From a list of device drivers on My Computer' and select Intel HD Graphics Family, that it will update its reporting of Display 2 to Dell U2713HM (DP). From all of this I think I've established: The monitor DP is fine becuase it works with my old laptop The MiniDP socket on the SP3 is functioning as it will output to HDMI, and can identify the monitor. It's got to be a driver issue? Any suggestions from anyone?