I am running XP professional on an HP Probook 6450b. I have been using a monitor with the dvi port on the docking station. A few days ago, the monitor started saying no signal detected. I switched to the vga port and the monitor is now working. When using the Properties settings, I noticed the "Extend my Windows settings onto this monitor" checkbox was unchecked. So I tried checking it on. However, upon refresh, it is automatically unchecked, even though the monitor window above the check box shows two monitors.
In terms of troubleshooting, I did the following:
- Tried the monitor and dvi cable on another system. The monitor worked in this situation.
- Did a rollback of system to point in time prior to when the dvi signal stopped working. Didn't fix things.
- Tried another docking station with the laptop/monitor. Still not working.
- Took my hard drive out and put it in another 6450b. Tested this with the monitor, still not working.
So, I short of doing a complete reformat/reinstall, are there some software options I should be looking into. I am just looking for some direction as where to start.
