Dell S1909WXWFP User Manual page 19

C Use this button to activate automatic setup/adjustment or to decrease the values of the selected menu option.
Auto Adjustment allows the monitor to self-adjust to the incoming video signal. After using Auto Adjustment, you can further tune your monitor by using the
Auto Adjust
Pixel Clock and Phase controls under Image Settings.
The following dialog appears on a black screen as the monitor automatically adjusts to the current input:
D Use the Input Select button to select between two different video signals that may be connected to your monitor.
VGA input
Input select
DVI-D input
NOTE: The floating 'Dell Self-test Feature Check' dialog appears on a black background if the monitor cannot sense a video signal. Depending upon the selected
input, one of the dialogs shown below will scroll continually.
If either VGA or DVI-D input is selected and both VGA and DVI-D cables are not connected, a floating dialog box as shown below appears.
or