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How to Use and Troubleshoot the Dell ST2x2x Series of Monitors

Summary: Steps for troubleshooting and general use of the Dell ST2x2x series of monitors.

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Article Content


Symptoms


This article contains information about using and troubleshooting the Dell ST2x2x series of monitors.


Table of Contents:

  1. Using the Monitor Self-Test
  2. Using the Built-In Diagnostics
  3. Common Monitor Issues
  4. Product-Specific Issues
  5. Soundbar Issues
  6. If You Require more Assistance

Using the Monitor Self-Test

The monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:

  1. Turn off both the computer and the monitor.
  2. Unplug the video cable from the back of the monitor. To ensure proper Self-Test operation, the analog (blue VGA connector) cables from the back of the computer.
  3. Turn on the monitor.
SLN297004_en_US__1icon Note: The monitor will go into Sleep Mode after 15 minutes if power is ON and video cables are not connected. This is to minimize power wastage when the monitor is not in use.
 
SLN297004_en_US__1icon Note: The following messages may change in different Display models (Figure 1).

SLN297004_en_US__3ST2x2xSelf-test
Figure 1

  1. This box also appears during normal system operation, if the video cable becomes disconnected or damaged.
  2. Turn off the flat panel display and reconnect the video cable; then turn on both the computer and the flat panel display.

If the display screen remains blank after using the previous procedure. Check the video controller and computer, because the flat panel display is functioning properly.

SLN297004_en_US__1icon Note: If the monitor screen remains blank after the customers use the previous procedure, check the video controller and computer, because the monitor is functioning properly.

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Using the Built-In Diagnostics

The monitor has a built-in diagnostic tool that helps you determine if the problem you are having is with the monitor, computer, or the video card.

SLN297004_en_US__1icon Note: You can only run the built-in diagnostics when the video cable is unplugged and the monitor is in self-test mode.

To run the built-in diagnostics:

Your monitor has a built-in diagnostic tool that helps to determine if the screen abnormality you are experiencing is with the monitor, computer, or video card. To run the built-in diagnostics:

  1. Ensure that the screen is clean (no dust particles on the surface of the screen).
  2. Unplug the video cable from the back of the computer or monitor. The monitor then goes into the self-test mode.
  3. Press and hold Button 1 and Button 4 simultaneously for 2 seconds. A gray screen should appear (Figure 2).

SLN297004_en_US__6ST2x2xOSD
Figure 2

  1. Carefully inspect the screen for abnormalities.
  2. Press Button 4 on the front panel again. The color of the screen should change to red.
  3. Inspect the screen for abnormalities.
  4. Repeat steps 5 and 6 to inspect the display in green, blue, black, white, and text screens.
  5. The test is complete when the white screen appears. To exit, press the 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.

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Common Monitor Issues

Common Symptoms What You Experience Possible Solutions
No 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.
  • The power on/off control is a capacitive touch sensitive sensor. Pressing it may or may not power on the monitor. Lightly touch on the power on/off icon to try again.
  • Ensure that the power button is depressed fully.
No Video/Power LED On No picture or no brightness
  • Increase the brightness and contrast using the On-Screen Display (OSD) menus.
  • Perform the monitor self-test check.
  • Check for bent or broken pins in the video cable connector.
  • Run the built-in diagnostics.
Poor Focus Picture is fuzzy, blurry, or ghosting
  • Perform Auto-Adjust using the On-Screen Display (OSD) menus.
  • Adjust the Phase and Pixel Clock controls using the OSD.
  • Avoid using any video extension cables.
  • Reset the monitor to Factory Settings using the OSD.
  • Change the video resolution to the correct aspect ratio (16:9).
Shaky/Jittery Video Wavy picture or fine movement
  • Perform Auto-Adjust using the On-Screen Display (OSD) menus.
  • Adjust the Phase and Pixel Clock controls using the OSD.
  • Reset the monitor to Factory Settings.
  • Check environmental factors.
  • Relocate the monitor and try it in another room.
Missing Pixels LCD screen has spots
  • Turn the monitor off and back on.
  • A pixel that is permanently off is a natural defect that can occur with all LCD technology.
  • For more information about Dell's Monitor Quality and Pixel Policy, go to this article.
  • Run the built-in diagnostics.
Stuck-on Pixels LCD screen has bright spots
  • Turn the monitor off and back on.
  • Reset the monitor to Factory Settings.
  • Auto Adjust via OSD.
  • Adjust brightness and contrast controls via OSD.
  • A pixel that is permanently stuck on is a natural defect that can occur with all LCD technology.
  • For more information about Dell's Monitor Quality and Pixel Policy, go to this article.
  • Run the built-in diagnostics.
Brightness Problems Picture too dim or too bright
  • Reset the monitor to Factory Settings.
  • Auto-Adjust using the on-screen display (OSD) menus.
  • Adjust the brightness and contrast controls using the OSD.
Geometric Distortion Screen is not centered correctly
  • Reset the monitor to Factory Settings.
  • Auto-Adjust using the on-screen display (OSD) menus.
  • Adjust the horizontal and vertical controls using the OSD.
    SLN297004_en_US__1icon Note: When using DVI-D or HDMI input, the positioning adjustments are not available.
Horizontal/Vertical Lines Screen has one or more lines
  • Reset the monitor to Factory Settings.
  • Auto-Adjust using the on-screen display (OSD) menus.
  • Adjust the Phase and Pixel Clock controls using the 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.
  • Run the built-in diagnostics.
    SLN297004_en_US__1icon Note: When using DVI-D or HDMI input, the Pixel Clock and Phase adjustments are not available.
Synchronization Problems Screen is scrambled or appears torn
  • Reset the monitor to Factory Settings.
  • Auto-Adjust using the on-screen display (OSD) menus.
  • Adjust the Phase and Pixel Clock controls using the 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 safe mode.
LCD scratched Screen has scratches or smudges
  • Turn the monitor off and clean the screen.
  • For cleaning instruction, see here
Safety-Related Issues Visible signs of smoke or sparks
Intermittent Problems Monitor malfunctions on and off
  • Make sure the video cable connecting the monitor to the computer is connected properly.
  • Reset the monitor to Factory Settings.
  • Perform the monitor self-test feature to determine if the intermittent problems occur in self-test mode.
Missing Color The picture is missing a color
  • 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.
  • Perform the self-test feature check.
  • Check the connection integrity at both ends of the video cable.
  • Check for bent or broken pins on the video connector.
  • Run the built-in diagnostics
Wrong Color Picture has incorrect colors
  • Change the Color Setting Mode in the Color Settings of the OSD to Graphics or Video depending on the application.
  • Try different Color Preset Settings in the Color Settings OSD. Adjust the R/G/B values in Color Settings OSD if Color Management is turned off.
  • Change the Input Color Format to PC RGB or YPbPr in the Advance Settings OSD.
  • Perform the self-test feature check.
  • Check the connection integrity at both ends of the video cable.
  • Check for bent or broken pins in the video cable connector.
  • Run the built-in diagnostics.
Image Retention from a Static Image Left on the Screen Faint shadow from the static image is visible on the screen
  • Use the Power Management settings to turn off the monitor always when not in use.
  • Alternatively, use a dynamically changing screensaver.
Black border on display when connected via HDMI A black border ranging from .5 inch to 1.5 inches may be present when connected via HDMI cable to AMD graphics adapter
  • This issue is due to AMD underscaling the image to 85% by default on HDMI connections.
  • Adjust the Digital Flat Panel scaling options in AMD Catalyst Control Center, My Digital Flat Panels, Scaling options. Set to Overscan 0%

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Product-Specific Issues

Specific Symptoms What You Experience Possible Solutions
Screen Image Is Too Small Image is centered on screen but does not fill the viewing area
  • Reset the monitor to Factory Settings.
Cannot Adjust the Monitor with the Buttons on the Front Panel OSD menus do not appear on the screen
  • Turn off the monitor, unplug the power cord, plug it back in, and then turn on the monitor.
No Input Signal when User Controls Are Pressed No picture, the LED is bright blue
  • Check the signal source. Make sure the computer is not in the power-saving mode by moving the mouse or pressing a key on the keyboard.
  • Check whether the video cable is plugged in properly. Replug the video cable if necessary.
  • Reset the computer or video player.
The Picture Does Not Fill the Entire Screen The picture does not fill the height or width of the screen
  • If a DVD is being played, check the specifications as some DVDs will only play in full-screen mode.
  • Run the built-in diagnostics.

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Soundbar Issues

Common Symptoms What users experience Possible solutions
No Sound Soundbar has power - power indicator is on
  • Plug the audio line-in cable into the computer's audio out jack.
  • Set all volume controls to their maximum and ensure that the mute option is not enabled.
  • Play some audio content on the computer (example, audio CD, or MP3).
  • Turn the Power/Volume knob on the Soundbar clockwise to a higher volume setting.
  • Clean and reseat the audio line-in plug.
  • Test the Soundbar using another audio source (For example: portable CD player, MP3 player).
Distorted Sound Computer's sound card is used as the audio source
  • Clear any obstructions between the Soundbar and the user.
  • Confirm that the audio line-in plug is inserted into the jack of the sound card.
  • Set all Windows volume controls to their midpoints.
  • Decrease the volume of the audio application.
  • Turn the Power/Volume knob on the Soundbar counterclockwise to a lower volume setting.
  • Clean and reseat the audio line-in plug.
  • Troubleshoot the computer's sound card.
  • Test the Soundbar using another audio source (For example: portable CD player, MP3 player).
  • Avoid using an audio cable extension or audio jack converter.
Distorted Sound Other audio source is used
  • Clear any obstructions between the Soundbar and the user.
  • Confirm that the audio line-in plug is inserted into the jack of the audio source.
  • Decrease the volume of the audio source.
  • Turn the Power/Volume knob on the Soundbar counterclockwise to a lower volume setting.
  • Clean and reseat the audio line-in plug.
Unbalanced Sound Output Sound from only one side of Soundbar
  • Clear any obstructions between the Soundbar and the user.
  • Confirm that the audio line-in plug is inserted into the jack of the sound card or audio source.
  • Set all Windows audio balance controls (L-R) to their midpoints.
  • Clean and reseat the audio line-in plug.
  • Troubleshoot the computer's sound card.
  • Test the Soundbar using another audio source (For example: portable CD player, MP3 player).
Low Volume Volume is too low
  • Clear any obstructions between the Soundbar and the user.
  • Turn the Power/Volume knob on the Soundbar clockwise to the maximum volume setting.
  • Set all Windows volume controls to their maximum.
  • Increase the volume of the audio application.
  • Test the Soundbar using another audio source (For example: portable CD player, MP3 player)

If you have further questions about this article, contact Dell Technical Support.

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Article Properties


Affected Product

Dell SR2220L, Dell SR2320L, Dell ST2220, Dell ST2220L, Dell ST2220M, Dell ST2220T, Dell ST2310, Dell ST2310B, Dell ST2320L, Dell ST2321L, Dell ST2410, Dell ST2410B, Dell ST2420L, Dell ST2421L

Last Published Date

21 Feb 2021

Version

4

Article Type

Solution

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