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I have an E-Port dock station and Dell Latitude E7440. I have recently switched from Windows 7 to Windows 8.1. System stopped detecting external monitor connected to my dock station.
Regardles of which port I use (VGA, DVI, DP), in the screen options in Windows the second display is always visible as VMM2300 ROM. It is greyed out and cannot be turned on.
When I connect the display directly to the laptop (with HDMI or HDMI -> VGA adapter) - screen is working.
Where the problem might be? I have already installed the newest graphic drivers and visited troubleshooting page with no luck.
fracz
Posted 2015-06-02T10:36:31.593
Reputation: 91