68 | TroubleshootingProduct-specific problemsSpecificSymptomsPossible SolutionsScreen image is toosmall∞ Check the Aspect Ratio setting in the Display settings OSD.∞ Reset the monitor to Factory Settings (Factory Reset) .Cannot adjust themonitor with thebuttons on the sidepanel∞ Turn off the monitor, unplug the power cord, plug it back, and thenturn on the monitor.∞ Check if the OSD menu is locked. If yes, press and hold the buttonabove the power button for 6 seconds to unlock. (For moreinformation, see Lock).No input signal whenuser controls arepressed∞ Check the signal source. Ensure the computer is not in standbyor sleep mode by moving the mouse or pressing any key on thekeyboard.∞ Check if the video cable is plugged in properly. Disconnect andreconnect the video cable if necessary.∞ Reset the computer or video player.The picture does notfill the entire screen∞ Due to different video formats (aspect ratio) of DVDs, the monitormay display in full screen.∞ Run the built-in diagnostics.