Per Dell-Cares the solution was:  1. In the System Tray (at the bottom-right corner of the screen), find the Battery icon. You may have to click the small arrow to show all icons. Right-click Battery and choose Power Options. 2. Within the Power Options window, on the left of the select "Choose what closing the lid does". 3. In the next window there will selections that can be made under "when I close the lid" and under the plugged in portion of the menu, change the dropdown box under Plugged in to "Do nothing". 4. If you would like, you can also change the same setting for On battery. Once the changes are made click save changes and restart the system.
Hi folk, We have just purchased an XPS 15 9520 and an Ultrasharp U2723QE monitor. I have the U2723QE connected to the XPS 15 9520 via the HDMI cable from input of the U2723QE to the extended adapter supplied with the XPS 15 9520. When I close the lid of the XPS 15 9520 to use only the U2723QE, the U2723QE goes blank with a message cannot connect to HDMI. How do I set up the U2723QE with the XPS 15 9520 so I can close the XPS 15 9520 and only use the U2723QE? Thanks in advance. MandJan
XPS 15 9520, U2723QE, close lid?