DELL P2422H 24 Inch Monitor Owner’s Manual

Service Manual­P2422H

General Safety Instructions

Use the following safety guidelines to help ensure your own personal safety and to help protect your equipment and working environment from potential damage.
NOTE: In this section, equipment refers to monitors. IMPORTANT NOTICE FOR USE IN HEALTHCARE ENVIRONMENTS: Dell products are not medical devices and are not listed under UL or IEC 60601 (or equivalent). As a result, they must not be used within 6 feet of a patient or in a manner that directly or indirectly contacts a patient
1.1 SAFETY: General Safety
WARNING: To prevent the spread of fire, keep candles or other open flames away from this product at all times.
When setting up the equipment for use:

• Place the equipment on a hard, level surface. Leave 10.2 cm (4 in) minimum of clearance on all vented sides of the computer to permit the airflow required for proper ventilation.

• Restricting the airflow can damage the computer or cause a fire. Do not stack equipment or place equipment so close together that it is subject to recalculated or preheated air.

• NOTE: Review the weight limits referenced in your computer documentation before placing a monitor or other devices on top of your computer.

• Ensure that nothing rests on your equipment’s cables and that the cables are not located where they can be stepped on or tripped over.

• Ensure that all cables are connected to the appropriate connectors. Some connectors have a similar appearance and may be easily confused (for example, do not plug a telephone cable into the network connector).

• Do not place your equipment in a closed-in wall unit or on a bed, sofa, or rug.

• Keep your device away from radiators and heat sources.

• Keep your equipment away from extremely hot or cold temperatures to ensure that it is used within the specified operating range.

• Do not push any objects into the air vents or openings of your equipment.

• Doing so can cause fire or electric shock by shorting out interior components.

• Avoid placing loose papers underneath your device.

• Do not place your device in a closed-in wall unit, or on a soft, fabric surface such as a bed, sofa, carpet, or rug.
  When operating your equipment:

• Do not use your equipment in a wet environment, for example, near a bathtub, sink, swimming pool, or in a wet basement.

• Do not use AC-powered equipment during an electrical storm. Battery-powered devices may be used if all cables have been disconnected.

• Do not spill food or liquids on your equipment.

• Before you clean your equipment, disconnect it from the electrical outlet. Clean your device with a soft cloth dampened with water.

• Do not use liquids or aerosol cleaners, which may contain flammable substances.

• Clean the monitor display with a soft, clean cloth and water. Apply the water to the cloth, then stroke the cloth across the display in one direction, moving from the top of the display to the bottom. Remove moisture from the display quickly and keep the display dry.

• Long-term exposure to moisture can damage the display. Do not use a commercial window cleaner to clean your display.

• If your equipment does not operate normally – in particular, if there are any unusual sounds or smells coming from it – unplug it immediately and contact an authorized dealer or service center.
  Protecting Against Electrostatic Discharge
  Electrostatic discharge (ESD) events can harm electronic components inside your equipment. Under certain conditions, ESD may build up on your body or an object, such as a peripheral, and then discharge into another object, such as your computer. To prevent ESD damage, you should discharge static electricity from your body before you interact with any of your equipment’s internal electronic components, such as a memory module. You can protect against ESD by touching a metal grounded object (such as an unpainted metal surface on your computer’s I/O panel) before you interact with anything electronic. When connecting a peripheral (including handheld digital assistants) to your equipment, you should always ground both yourself and the peripheral before connecting it. In addition, as you work inside the equipment, periodically discharge any static charge your body may have accumulated.
  You can also take the following steps to prevent damage from electrostatic discharge:

• When unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material until you are ready to install the component.

• Just before unwrapping the antistatic package, be sure to discharge static electricity from your body.

• When transporting a sensitive component, first place it in an antistatic container or packaging.

• Handle all electrostatic-sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.

1.2 SAFETY: General Power Safety
Observe the following guidelines when connecting your equipment to a power source:

• Check the voltage rating before you connect the equipment to an electrical outlet to ensure that the required voltage and frequency match the available power source.

• Do not plug the equipment power cables into an electrical outlet if the power cable is damaged

• Norway and Sweden: If this product is provided with a 3-prong power cable, connect the power cable to a grounded electrical outlet only.

• If you use an extension power cable, ensure that the total ampere rating of the products plugged into the extension power cable does not exceed the ampere rating of the extension cable.

• If you must use an extension cable or power strip, ensure the extension cable or power strip is
  connected to a wall power outlet and not to another extension cable or power strip. The extension cable or power strip must be designed for grounded plugs and plugged into a grounded wall outlet. If you are using a multiple-outlet power strip, use caution when plugging the power cable into the power strip. Some power strips may allow you to insert a plug incorrectly. Incorrect insertion of the power plug could result in permanent damage to your equipment, as well as a risk of electric shock and/or fire. Ensure that the ground prong of the power plug is inserted into the mating ground contact of the power strip.

• Be sure to grasp the plug, not the cable, when disconnecting equipment from an electric socket.
  If your equipment uses an AC adapter:

• Use only the Dell-provided AC adapter approved for use with this device. The use of another AC adapter may cause a fire or explosion.

• NOTE: Refer to your system rating label for information on the proper adapter model approved for use with your device.

• Place the AC adapter in a ventilated area, such as a desktop or on the floor, when you use it to run the computer or to charge the battery. Do not cover the AC adapter with papers or other items that will reduce cooling; also, do not use the AC adapter inside a carrying case.

• The AC adapter may become hot during the normal operation of your computer. Use care when handling the adapter during or immediately after operation.

• It is recommended that you lay the adapter on the floor or desk so that the green light is visible. This will alert you if the adapter should accidentally go off due to external effects. If for any reason the green light goes off, disconnect the AC power cord from the wall for a period of ten seconds, and then reconnect the power cord.

• Japan-Only: Use only the Dell-provided AC power cable with the AC adapter. Use of any other power cable may damage the device or AC adapter or may present a risk of fire or electric shock.

 Exploded view diagram with list of items

NOTE:
For replacement of power cord, connectivity cable, and external power supply (if applicable), contact Dell:

1. Go to https://www.dell.com/support.
2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page.
3. Click Contact Us next to the country dropdown.
4. Select the appropriate service or support link based on your need.
5. Choose the method of contacting Dell that is convenient for you

Wiring connectivity diagram

How to connect and disconnect power cable/ connectivity cable

WARNING: Before you begin any of the procedures in this section, follow the Safety instructions.
NOTE: Do not connect all cables to the monitor at the same time. It is recommended to route the cables through the cable-management slot before you connect them to the monitor.
To connect your monitor to the computer:

1. Turn off your computer and disconnect the power cable.
2. Connect the DisplayPort cable (shipped with your monitor) from your monitor to the computer.
3. Connect the HDMI or VGA cable (optional purchase) from your monitor to the computer.
4. Connect the USB upstream cable (shipped with your monitor) to an appropriate USB 3.0 port on your computer. (See Bottom view for details.)
5. Connect the USB 3.0 peripherals to the downstream USB 3.0 ports on the monitor.

Connecting the DP and USB 3.0 cable

Connecting the HDIM cable (optional)

Connecting the VGA cable (optional)

6. Connect the power cables from your computer and monitor into a wall outlet.

Organizing cables
Use the cable-management slot to route the cables connected to your monitor.

Mechanical Instruction

NOTE:
This “Disassembly and Assembly Procedures” is for EMEA only, not for other regions. Please note that Dell will deem the warranty void if any disassembly is done on the monitors.
Tools Required
List the type and size of the tools that would typically be used to disassemble the product to a point where components and materials requiring selective treatment can be removed.
Tool Description:
− Screwdriver (Phillip-head, Hexagonal head)
− Penknife

5.1Disassembly Procedures

Note:
Put the monitor on a flat, soft, and clean surface.

| | | Unscrew the 4 screws by the Philips-head
Screwdriver. Torque=6±1kgf.cm
Remove the Rear cover| | | Take scraper insert the bezel bottom site
Disconnect the FFC cables and LVDS cable.| | | Remove the connectors and tapes
Remove the mainframe| | | Tear out all the tapes. Unscrew the 2 screws
on the USB board and mainframe.
Torque=6±1kgf.cm Tear out the wires and
mylar.
| | | remove the screws on the board by the
Philips-head. Torque=6±1kgf.cm
Remove the mainboard
and power board| | | Unscrew the plastic screws on the mylar
Mainboard and powerboard| | |
Remove the middle frame| | | Unscrew the screws on the middle frame
panel| | |
---|---|---|---

5.2 Assembly Procedures

Assemble mainboard and
powerboard| | | Tighten the screws on
the board
connect the FC cables
and LVDS cable.| | | Connect all connectors and tapes.
Tighten the screw on the board
Assemble the rear cover| | | Tighten the 4 screws by the Philips-head
Screwdriver. Torque=6±1kgf.cm
Assemble the stand ass’y| | |

Troubleshooting instructions

WARNING: Before you begin any of the procedures in this section, follow the Safety instructions.
Self-Test
Your monitor provides a self-test feature that allows you to check if 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 your computer and the monitor.
2. Disconnect all video cables from the monitor. This way. the computer doesn’t have to be involved.
3. Turn on the monitor. The floating dialog box should appear on-screen (against a black background). if the monitor cannot sense a video signal and is working correctly. While in self-test mode. the power LED remains white. Also. depending upon the selected input. one of the dialogs shown below will continuously scroll through the screen.

Built-in diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if any screen abnormality you experience is an inherent problem with your monitor, or with your computer and 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. Press and hold in Up or Down or Left or Right direction for 4 secs and wait for a pop-up menu.

3. Use up or down direction to select them and press to confirm A gray test pattern appears at the beginning of the diagnostic program.

4. Carefully inspect the screen for abnormalities.

5. Select Up or Down or Left or Right key to change the test patterns.

6. Repeat steps 4 and 5 to inspect red, green. blue. black, white, and text screens.

7. When in the White color test screen, check for white color uniformity and if there-white color appears greenish/reddish, etc.

8. Press Up or Down or Left or Right key to end the diagnostic program.

9. This box also appears during normal system operation. if the video cable becomes disconnected or damaged.

10. Turn Off your monitor and reconnect the video cable: then turn On both your computer and the monitor. If your monitor screen remains blank after you use the previous procedure, check your video controller and computer. because your monitor is functioning properly.

Common problems
The following table contains general information about common monitor problems you might encounter and the possible solutions:

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 via the Input Source menu.
No Video/Power LED on|  • Increase brightness and contrast controls using the 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 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.
• 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: www.dell.com/pixelguidelines.
Stuck-on Pixels| • Cycle power On-Oft
• 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: www.dell.com/pixelguidelines.
Brightness Problems| • Reset the monitor to Factory Settings (Factory Reset).
• Adjust brightness & contrast controls via OSD.
---|---
Geometric Distortion| • Reset the monitor to Factory Settings (Factory Reset). • Adjust horizontal & vertical controls via OSD.
  horizontal Vertical Lines| • Reset the monitor to Factory Settings (Factory Reset).
• 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| • Reset the monitor to Factory Settings (Factory Reset).
• 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.
Safety Related Issues| • Do not perform any troubleshooting steps.
• Contact Dell immediately.
Intermittent Problems| • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
• Reset the monitor to Factory Settings (Factory Reset).
• Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.
Missing Color| • Perform monitor self-test feature check.
• Ensure that the video cable connecting the monitor to the computer is the connected property and is secure.
• Check for bent or broken pins in the video cable connector.
Wrong Color|  • Change the Color Setting Mode in the Color Settings OSD to Graphics or Video depending on the application.
• 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 YPbPr in the Color settings OSD.
• Run the built-in diagnostics.
Image retention from a static image
left on the monitor for a long period of time| • Set the screen to turn off after a few minutes of screen idle time. These can be adjusted in Windows Power Options or Mac Energy Saver settings.
– Alternatively, use a dynamically changing screensaver.
Video Ghosting or Overshooting| • Change the Response Time in the Display OSD to Normal, Fast, or Extreme depending on your application and usage.

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