Dell SE2425H - Common Problems

Troubleshooting Instructions 31
Common problems
The following table provides general information about common monitor problems that you might encounter and the possible solutions:
Table 4. Common problems and solutions.
Common symptoms Possible solutions
No video/Power LED off • 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 pressed.
• Ensure that the correct input source is selected using the Input Source menu.
No video/Power LED on • Increase brightness and contrast controls using the OSD.
• Perform a 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 using the Input Source menu.
Poor focus • Eliminate video extension cables.
• Reset the monitor to Factory Settings (Factory Reset).
• Change the video resolution to the correct aspect ratio.
Shaky/Jittery video • Reset the monitor to Factory Settings (Factory Reset).
• Check environmental factors.
• Relocate the monitor and test in another room.
Missing pixels • Cycle power On-off.
• A pixel that is permanently off is a natural defect that can occur in LCD technology.
• For more information about Dell Monitor Quality and Pixel Policy, see Dell Support site
at: www.dell.com/pixelguidelines.
Stuck-on pixels • Cycle power On-off.
• A pixel that is permanently off is a natural defect that can occur in LCD technology.
• For more information about Dell Monitor Quality and Pixel Policy, see Dell Support site
at: www.dell.com/pixelguidelines.
Brightness problems • Reset the monitor to Factory Settings (Factory Reset).
• Adjust brightness and contrast controls using OSD.
Geometric distortion • Reset the monitor to Factory Settings (Factory Reset).
• Adjust horizontal and vertical using OSD.
Horizontal/Vertical lines • Reset the monitor to Factory Settings (Factory Reset).
• Perform a 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 • Reset the monitor to Factory Settings (Factory Reset).
• Perform a 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 safe mode.
Safety-related issues • Do not perform any troubleshooting step.
• Contact Dell immediately.
Intermittent problems • Try different Preset Modes in Color settings OSD. Adjust R/G/B value in Custom Color in
Color settings OSD.
• Change the Input Color Format to RGB or YCbCr/YPbPr in the Color settings OSD.
• Run the built-in diagnostics.