dual monitor (DVI) is causing display to go blank on boot-up after windows logo appears
Posted on 2014-07-16
I have a user with an HP Probook G45 laptop connected to an HP docking station.
I have a user that has an HP monitor connected to the docking station via VGA and everything works great, no issues no problems. While the computer is up and running, the user connects a 2nd HP monitor to the docking station, via DVI and everything works great, no issues no problems. You can move windows between screens, you switch/swap primary monitor to secondary monitor and vice versa, everything works great. The problem occurs when the user shutdowns the laptop and re-boots.
When the user re-boots the laptop, the windows logo appears on both monitors; then after the windows logo goes away, both screens go blank and nothing is displayed. When I un-plug the 2nd monitor (DVI) cable from the docking station, the primary monitor (VGA) displays the Ctrl-Alt-Del screen. Upon logging on, the user can plug the DVI cable back in to the docking station and everything is good again ....... until the user shuts down and re-boots.
This is a puzzling one. Any ideas for me to try? Is there a BIOS setting that I need to look at? Do both monitors have to be of the DVI type?
I went to another laptop (albeit, an HP Elitebook) and tried the same combination of monitors (VGA primary, DVI secondary) and when the user re-booted, both monitors came up just fine, just like it is suppose to.
Any guidance you can give me would be appreciated. Please note: this is not an emergency. The user is up and running with the VGA monitor, but the 2nd monitor would be nice.