Having problems with displaying your screen through a projector or multiple displays? It’s not the ideal scenario to start a presentation in front of an audience or a packed board room and spend a number of minutes fiddling around with your laptop to get it to display the screen through the projector; I bet you start your presentation on the wrong foot!
Windows 7 is designed to reduce your display brightness after several minutes of inactivity on your laptop computer. The display can use more power than any other part of a laptop computer—even more than a hard disk and CPU, hence this feature is very useful to conserve battery life. Some laptops have a dedicated button or dial to change the display brightness.
The windows NVIDIA display driver installed after a fresh installation of the 32-bit Ultimate/Enterprise editions creates problems on Dell Latitude D830 laptops with the Nvidia Quadro NVS 135M inbuilt video card! The faulty display driver version is 126.96.36.19924 as shown below: