Dell U2414H Monitor - Manual (Page 46)

46 | Operating the Monitor
OSD Warning Messages
When the Dynamic Contrast feature is enabled (in these preset modes: Game or Movie),
the manual brightness adjustment is disabled.
When the monitor does not support a particular resolution mode, you will see the
following message:
This means that the monitor cannot synchronize with the signal that it is receiving from
the computer. See
Monitor Specifications for the Horizontal and Vertical frequency
ranges addressable by this monitor. Recommended mode is 1920 x 1080.
You will see the following message before the DDC/CI function is disabled: