34 | TroubleshootingProduct-Specific ProblemsSpecificSymptomsWhat YouExperiencePossible SolutionsScreen image istoo smallImage is centeredon screen, butdoes not fill entireviewing area∞ Check the Aspect Ratio setting in the Displaysettings OSD.∞ Reset the monitor to Factory Settings(FactoryReset) .Cannot adjust themonitor with thebuttons on theside panelOSD does notappear on thescreen∞ Turn Off the monitor, unplug the power cord, plugit back, and then turn On the monitor.∞ Check if the OSD menu is locked. If yes, pressand hold the button above the Power button for10 seconds to unlock. (For more information, seeLock).No Input Signalwhen usercontrols arepressedNo picture, theLED light is white∞ Check the signal source. Ensure the computer isnot in standby or sleep mode by moving the mouseor pressing any key on the keyboard.∞ Check if the video cable is plugged in properly.Disconnect and reconnect the video cable ifnecessary.∞ ∞Reset the computer or video player.The picture doesnot fill the entirescreenThe picturecannot fill theheight or width ofthe screen∞ Due to different video formats (aspect ratio) ofDVDs, the monitor may display in full screen.∞ Run the built-in diagnostics.