Instruction Manual

1. Introduction

This manual provides essential instructions for the proper installation and care of your Daguys LCD Screen and Digitizer Full Assembly for the Vivo Y51 (2020) / Y51a V2030. This replacement part is designed to restore the display and touch functionality of your device. Please read all instructions carefully before proceeding with installation.

Image: Front and back view of the Daguys LCD Screen and Digitizer Full Assembly. The front shows the display area with a notch for the camera, and the back shows the flex cables and connectors.

2. Compatibility

This LCD Screen and Digitizer Full Assembly is specifically compatible with the following smartphone models:

• Vivo Y51 (2020)
• Vivo Y51a (Model V2030)

Please verify your phone model before purchasing and attempting installation to ensure proper fit and function.

3. Safety Information and Precautions

Repairing electronic devices requires careful handling. Adhere to the following safety guidelines:

• Static Electricity: Before attempting any repair, ensure you are properly grounded using an ESD (Electrostatic Discharge) strap. This prevents static electricity from damaging sensitive electronic components within the phone.
• Eye Protection: Always wear eye protection to guard against potential glass splinters or other debris during the repair process.
• Handle with Care: The screen assembly is a fragile component. Avoid applying excessive force or bending it.
• Power Off: Always power off your device completely and disconnect the battery before starting any repair.
• Professional Installation: Professional installation is highly recommended for optimal results and to prevent damage to your device or the new part.

4. Before Installation Notes

Proper preparation is crucial for a successful screen replacement. Follow these steps before full installation:

1. Test Before Installation: This is the most critical step.
   • Do not remove any protective films or tags from the new screen assembly before testing.
   • Connect the new LCD screen and digitizer assembly to the phone's motherboard (without fully installing it into the frame).
   • Power on the phone and test all functions: display clarity, touch responsiveness across the entire screen, and any other relevant features.
   • If the test is successful, proceed with installation. If any issues arise (e.g., black display, unresponsive touch), contact customer support immediately. Do not force installation if the test fails.
2. Cable Handling: Ensure the LCD flex cable is not over-bent. Bending the cable beyond 90 degrees can cause permanent damage, leading to a black display or other malfunctions.

Image: Close-up view of the flex cable and connector on the screen assembly, highlighting the delicate nature of the component.

5. Installation Guide

This section provides a general guide for replacing your phone's screen. Specific steps may vary slightly depending on your device's internal design. Refer to device-specific repair guides or seek professional assistance if unsure.

Image: The Daguys LCD Screen and Digitizer Full Assembly shown alongside a set of basic repair tools, including screwdrivers, prying tools, and a suction cup.

1. Gather Tools: Ensure you have the necessary tools, which typically include small screwdrivers, prying tools (plastic spudgers), a suction cup, and a heat gun or hairdryer (to loosen adhesive).
2. Power Off Device: Completely power off your Vivo Y51 (2020) / Y51a V2030.
3. Remove SIM Tray: Eject the SIM card tray.
4. Open Device: Carefully open the phone. This usually involves heating the edges to soften adhesive and then using a suction cup and prying tools to separate the screen assembly from the frame. Be gentle to avoid damaging internal components or cables.
5. Disconnect Battery: Locate and disconnect the battery flex cable from the motherboard to prevent short circuits during the repair.
6. Disconnect Old Screen: Carefully disconnect the flex cables of the old screen assembly from the motherboard.
7. Remove Old Screen: Remove the old, damaged screen assembly from the phone frame. Clean any remaining adhesive from the frame.
8. Connect New Screen (Test): As per Section 4, connect the new Daguys LCD Screen and Digitizer Full Assembly to the motherboard for testing. Do not fully adhere it yet.
9. Full Installation (If Test Passes): If the test is successful, disconnect the new screen, apply new adhesive to the phone frame (if necessary), and carefully seat the new screen assembly into the frame. Reconnect all flex cables securely.
10. Reconnect Battery: Reconnect the battery flex cable.
11. Reassemble Device: Carefully close the phone, ensuring all clips and adhesive points are secure.
12. Power On: Power on your device and perform a final check of all functions.

6. Operating the New Screen

Once installed, your new Daguys LCD Screen and Digitizer Full Assembly will function identically to the original screen. You can expect:

• Clear and vibrant display.
• Responsive multi-touch functionality.
• Accurate digitizer response for all gestures and inputs.

Adjust display settings (brightness, color temperature) through your phone's operating system settings if desired.

7. Maintenance

To ensure the longevity and optimal performance of your new screen, follow these maintenance tips:

• Cleaning: Use a soft, lint-free cloth (microfiber is ideal) to gently wipe the screen. For stubborn smudges, slightly dampen the cloth with water or a screen-specific cleaning solution. Avoid harsh chemicals or abrasive materials.
• Protection: Consider using a screen protector and a protective case to guard against scratches, drops, and impacts.
• Avoid Extreme Conditions: Protect your device from extreme temperatures, direct sunlight for prolonged periods, and excessive moisture.
• Gentle Handling: Avoid placing heavy objects on the screen or applying excessive pressure.

8. Troubleshooting

If you encounter issues after installation, consider the following:

• Black Display:
  • Ensure all flex cables are securely connected to the motherboard.
  • Check if the LCD flex cable was over-bent during installation (refer to Section 4).
  • Verify the battery is properly connected and charged.
• Unresponsive Touch:
  • Ensure the digitizer flex cable is securely connected.
  • Restart the phone.
  • Check for any debris or foreign objects between the screen and the frame.
• Display Anomalies (Lines, Discoloration):
  • This could indicate a damaged flex cable or a faulty screen. Recheck connections.
• Device Not Powering On:
  • Ensure the battery is fully charged and properly connected.
  • Verify all internal connections are secure.

If troubleshooting steps do not resolve the issue, please contact customer support for further assistance.

9. Specifications

10. Warranty and Support

This product is inspected and in good condition before shipment. For any questions regarding quality assurance or friendly after-sales service, please contact us in a timely manner. We are committed to providing support for any issues you may encounter.

Please retain your proof of purchase for any warranty claims or support requests.