Problem

How could I troubleshoot a black screen when I start the system on the LVC-5000, 5550S, 5570, or 5770?

Solution

Use the hotkey to switch between different displays to check if the display configuration is properly set.
Enable Monitor (VGA Port)............ Ctrl/Alt/F1 
Enable Digital Display (DVI /HDMI Port) ... Ctrl/Alt/F4