Plugable USB 2.0 docking station, 2 identical HP laptops with Windows 7 plus monitor plugged into docking station. Loaded SW per instructions on both. On first laptop, worked as expected with monitor plugged into docking station – extended screen, duplicate screens. Used the same docking station for setting up both laptops
On second laptop, using same docking station and monitor, get the following:
–Setting -“Duplicate These Displays” the laptop screen is normal, but monitor screen is black with message “signal over range”
–“Extend these Displays” Normal - wallpaper, no windows or icons
– Show Desktop only on   - performs as expected.
Need help – what might I be overlooking?
Setting up for church service audio/visual, on projector screen Powerpoint