dvi connect stopped working

dvi stopped working - I just Pro8 Docking system. I plugged it in to dell pro8 8 tablet. It initially worked and I was able to extend the display to acer p191 monitor. After about 1/2 hour of use it just stopped working. Tried rebooting , loading any driver I could find nothing helps.

Additional info: I see in the devices that it is being correctly found. When I turn of the docking station the monitor does not show and when I turn it back on it does show show correctly

Hi Chaim - Thanks for posting!  If you hit the Windows-P hotkey and choose “extend” does that make a difference?  Is the docking station attached monitor showing up in the Windows Screen Resolution control panel (Windows-R and enter “desk.cpl”)?  Thanks for your patience!