NOTE: This monitor has a built-in feature to automatically calibrate the brightness to compensate for LED aging.OSD Warning MessagesWhen the Energy Smart or 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 1200.You will see the following message before the DDC/CI function is disabled: