Dell U2412M User Manual

Also see for UltraSharp U2412M: User guide Specifications Setting-up guide Product dimensions User guide

Dell U2412M User Manual Manual pdf 34 page image

7. Repeat steps 5 and 6 to inspect the display in green, blue, black and white screens.The test is complete when the white screen appears. To exit, press Button 4 again.If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card and computer.Common ProblemsThe following table contains general information about common monitor problems you might encounter and the possible solutions:Common Symptoms What You Experience Possible SolutionsNo Video/Power LED off No picture Ensure that the video cable connecting the monitor and the computer is properly connected and secure.Verify that the power outlet is functioning properly using any other electrical equipment.Ensure that the power button is depressed fully.Ensure that the correct input source is selected via the Input Source Select button.No Video/Power LED on No picture or no brightness Increase brightness & contrast controls via OSD.Perform monitor self-test feature check.Check for bent or broken pins in the video cable connector.Run the built-in diagnostics.Ensure that the correct input source is selected via the Input Source Select button.Poor Focus Picture is fuzzy, blurry, or ghosting Perform Auto Adjust via OSD.Adjust the Phase and Pixel Clock controls via OSD.Eliminate video extension cables.Reset the monitor to Factory Settings.Change the video resolution to the correct aspect ratio (16:10).Shaky/Jittery Video Wavy picture or fine movement Perform Auto Adjust via OSD.Adjust the Phase and Pixel Clock controls via OSD.Reset the monitor to Factory Settings.Check environmental factors.Relocate the monitor and test in another room.Missing Pixels LCD screen has spots Cycle power on-off.Pixel that is permanently off is a natural defect that can occur in LCD technology.For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com.Stuck-on Pixels LCD screen has bright spots Cycle power on-off.Pixel that is permanently off is a natural defect that can occur in LCD technology.For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com.Brightness Problems Picture too dim or too bright Reset the monitor to Factory Settings.Auto Adjust via OSD.Adjust brightness & contrast controls via OSD.Geometric Distortion Screen not centered correctly Reset the monitor to Factory Settings.Auto Adjust via OSD.Adjust horizontal & vertical controls via OSD.NOTE: When using DVI-D input, the positioning adjustments are not available.Horizontal/Vertical Lines Screen has one or more lines Reset the monitor to Factory Settings.Perform Auto Adjust via OSD.Adjust Phase and Pixel Clock controls via OSD.Perform monitor self-test feature check and determine if these lines are also in self-test mode.Check for bent or broken pins in the video cable connector.Run the built-in diagnostics.NOTE: When using DVI-D input, the Pixel Clock and Phase adjustments are not available.Synchronization Problems Screen is scrambled or appears torn Reset the monitor to Factory Settings.Perform Auto Adjust via OSD.Adjust Phase and Pixel Clock controls via OSD.Perform monitor self-test feature check to determine if the scrambled screen appears in self-test mode.Check for bent or broken pins in the video cable connector.Restart the computer in the safe mode.Safety Related Issues Visible signs of smoke or sparks Do not perform any troubleshooting steps.Contact Dell immediately.Intermittent Problems Monitor malfunctions on & off Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.Reset the monitor to Factory Settings.Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.Missing Color Picture missing color Perform monitor self-test feature check.Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.Check for bent or broken pins in the video cable connector.Wrong Color Picture color not good Change the Color Setting Mode in the Color Settings OSD to Graphics or Video depending on the application.Try different Color Preset Settings in Color Settings OSD. Adjust R/G/B value in Color Settings OSD if the Color Management is turned off.Change the Input Color Format to PC RGB or YPbPr in the Advance Setting OSD.Run the built-in diagnostics.Image retention from a static image left on themonitor for a long period of timeFaint shadow from the static image displayed appears onthe screenUse the Power Management feature to turn off the monitor at all times when not in use (for more information, see Power Management Modes).Alternatively, use a dynamically changing screensaver.Product Specific ProblemsSpecific Symptoms What You Experience Possible SolutionsScreen image is too small Image is centered on screen, but does not fill entireviewing areaCheck the Scaling Ratio setting in Image Setting OSDReset the monitor to Factory Settings.Cannot adjust the monitor with the buttons on the frontpanelOSD does not appear on the screen Turn off the monitor, unplug the power cord, plug it back, and then turn on the monitor.Check whether the OSD menu is locked. If yes, press and hold the button above the Power button for 10 seconds to unlock (for more information, see Menu Lock).No input signal when user controls are pressed No picture, the LED light is blue Check the signal source. Ensure the computer is not in the power saving mode by moving the mouse or pressing any key on the keyboard.

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