Dell U2415 Monitor - Manual (Page 60)

60 | Troubleshooting
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: http://www.dell.com/
support/monitors.
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: http://www.dell.com/
support/monitors.
Brightness
Problems Picture too dim
or too bright • Reset the monitor to factory settings.
• Adjust brightness & contrast controls via OSD.
Geometric
Distortion Screen not
centered
correctly • Reset the monitor to factory settings.
• Adjust horizontal & vertical controls via OSD.
Horizontal/
Vertical Lines Screen has one
or more lines • Reset the monitor to factory settings.
• 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.
Synchronization
Problems Screen is
scrambled or
appears torn • Reset the monitor to factory settings.
• 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 settings of the Preset Modes in the Color menu
OSD depending on the application.
• Adjust R/G/B value under Custom. Color in Color menu
OSD.
• Change the Input Color Format to PC RGB or YPbPr in the
Color menu OSD.
• Run the built-in diagnostics.