I need your help! I've bought HP ProBook 6470b laptop with i5-3210M CPU @2.50GHz and integrated Intel HD Graphics 4000, 4 GB RAM.
Running Windows 7 Enterprise 64bit SP1 Build 7601 with Intel graphics driver version: 220.127.116.1161
Can't connect 3rd display (using two HP LA2306x) neither with 2xHDMI, 2xVGA, or 1xHDMI and 1xVGA.
At the time I can use only two of them: One HP with laptops display or both HPs when laptop lid is closed.
When all the monitors are connected I can see them (below), but if I choose to etend second display, click Apply and Keek Changes - nothing hapens, same window appears (bellow).
Question: How the 3rd monitor should be connected? (it's written in intel.com what HP Graphics 4000 supports up to 3 displays)
I am also have a Probook 6445b and having the same issue. Previously, I had a Probook 6445b with two HP Compaq LA2006x monitors connected; one monitor connected directly and the second via an HP USB Graphics Adapter (model # NL571AA). Upon attempting to configure the monitors in the same way with my 6445b, my laptop crashes presenting the 'blue' screen. When I attempt to connect without the adapter, the computer appears to see the 3rd monitor but will not connect. Any advice would be greatly appreciated.