[. . . ] If no picture is displayed on the monitor even after the following remedial action is taken, contact your local dealer. [. . . ] problems Possible cause and remedy · The message shown left may appear, because some PCs do not output the signal soon after power-on. When inputting a sync-on-green signal, the [SoG] setting for the monitor must be changed in advance according to the procedure below (for analog signal). The message shows that the input signal is out of · Check whether the signal setting of your PC matches the the specified frequency resolution and the vertical frequency settings for the monitor. The sensor on the front side of the monitor detects the environmental brightness to adjust the screen brightness automatically and comfortably by using the Auto EcoView function. [. . . ] The sensor on the front side of the monitor detects the environmental brightness to adjust the screen brightness automatically and comfortably by using the Auto EcoView function. [. . . ]