BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly User Manual

1. Introduction

This manual provides essential information for the installation, operation, maintenance, and troubleshooting of your BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly. This product is designed as a replacement part for the BLU G91 Pro smartphone, restoring its display and touch functionality.

2. Important Safety Information

• Professional Installation Recommended: Replacing a smartphone screen is a delicate procedure. We strongly recommend seeking assistance from a qualified repair shop or professional technician. Improper installation can lead to damage to the product or your device, which is not covered by warranty.
• Pre-Installation Testing: Always test the LCD assembly thoroughly before final installation. Connect the flex cables to the motherboard and power on the device to check display functionality, touch response, and any visual defects. Do not remove protective films or adhesive until testing is complete and satisfactory.
• No Warranty After Installation: Please be aware that there is no warranty coverage for the product once it has been fully installed. Any issues must be reported and verified before installation.
• Handle with Care: The LCD and digitizer are fragile components. Avoid bending flex cables, applying excessive pressure, or dropping the assembly.
• Static Electricity: Take precautions against static electricity, which can damage electronic components. Use an anti-static wrist strap if possible.
• Power Off Device: Ensure your BLU G91 Pro smartphone is completely powered off and the battery is disconnected before attempting any installation.

3. Package Contents

Your package should contain the following:

• 1 x BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly

Note: Tools for installation are typically not included and must be acquired separately.

4. Specifications

5. Setup and Installation

Replacing the LCD and touch screen digitizer assembly requires careful attention to detail. It is highly recommended that this procedure be performed by a professional technician to avoid damage.

5.1 Pre-Installation Testing

Before proceeding with the full installation, it is crucial to test the new screen assembly. This ensures the product is fully functional upon arrival and prevents issues after permanent installation.

1. Unpack Carefully: Gently remove the new LCD assembly from its packaging. Do not remove any protective films or stickers at this stage.
2. Connect Flex Cables: With your BLU G91 Pro smartphone disassembled (back cover removed, battery disconnected), carefully connect the flex cables of the new LCD assembly to the corresponding connectors on the phone's motherboard. Do not apply adhesive or fully mount the screen yet.
3. Reconnect Battery & Power On: Reconnect the battery and power on your phone.
4. Test Functionality: Check the display for any abnormalities (dead pixels, lines, discoloration). Test the touch screen thoroughly across the entire surface, including multi-touch gestures. Verify that all areas respond correctly.
5. Power Off: If the screen functions correctly, power off the device and disconnect the battery before proceeding with full installation.

If any issues are found during this testing phase, contact customer support immediately. Do NOT proceed with full installation.

5.2 General Installation Steps (Professional Guidance Recommended)

The following is a general overview. Specific steps may vary depending on the BLU G91 Pro's internal design. Always refer to detailed repair guides or professional advice.

1. Disassemble Device: Carefully open your BLU G91 Pro, remove the back cover, disconnect the battery, and detach the old, damaged screen assembly.
2. Clean Frame: Thoroughly clean the phone's frame, removing any old adhesive residue or glass fragments. A clean surface is essential for proper adhesion of the new screen.
3. Apply Adhesive: Apply a thin, even layer of appropriate adhesive (e.g., B-7000, T-7000) around the perimeter of the phone's frame where the screen will sit.
4. Install New Screen: Carefully align the new LCD assembly with the phone's frame. Gently press it into place, ensuring all edges are flush.
5. Secure Connections: Reconnect all flex cables securely to the motherboard.
6. Reconnect Battery & Reassemble: Reconnect the battery and carefully reassemble the phone, ensuring all screws and components are in their correct positions.
7. Curing Time: Use clamps or rubber bands to hold the screen firmly in place while the adhesive cures (typically 24-48 hours). Avoid using the phone during this period.

Image: Front and back view of the BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly.

Image: Back view of the BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly, highlighting flex cables.

6. Operating the Display

Once installed, the LCD Display and Touch Screen Digitizer Assembly functions identically to the original screen of your BLU G91 Pro. It provides visual output and registers touch input for interacting with your smartphone.

• Display: The screen will show all visual information from your phone's operating system and applications.
• Touch Input: Use your fingers to tap, swipe, pinch, and perform other gestures to navigate the phone's interface.
• Brightness: Adjust screen brightness through your phone's settings for optimal viewing in various lighting conditions.

7. Maintenance and Care

Proper care will extend the lifespan and maintain the performance of your new screen.

• Cleaning: Use a soft, lint-free microfiber cloth to gently wipe the screen. For stubborn smudges, slightly dampen the cloth with water or a screen-specific cleaning solution. Avoid harsh chemicals, abrasive materials, or excessive moisture.
• Protection: Consider using a screen protector (tempered glass or film) and a protective case for your phone to guard against scratches and impacts.
• Avoid Extreme Conditions: Do not expose the phone to extreme temperatures, direct sunlight for prolonged periods, or high humidity.
• Handle Gently: Avoid dropping the phone or placing heavy objects on the screen.

8. Troubleshooting

If you encounter issues after installation, consider the following common problems and solutions:

If troubleshooting steps do not resolve the issue, and the problem was not present during pre-installation testing, professional assistance may be required.

9. User Tips

• Watch Repair Videos: Before attempting any repair, search for specific repair videos for the BLU G91 Pro on platforms like YouTube. These visual guides can be invaluable.
• Organize Screws: Keep track of all screws and small parts during disassembly. Using a magnetic mat or labeled compartments can prevent loss and ensure correct reassembly.
• Gentle Heat: A heat gun or hairdryer can be used on a low setting to soften old adhesive, making screen removal easier. Be cautious not to overheat the device.
• Patience is Key: Rushing the repair process can lead to mistakes and damage. Take your time and work in a well-lit, clean environment.

10. Warranty and Support

10.1 Warranty Information

This BLU G91 Pro LCD Display and Touch Screen Digitizer Assembly comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and issues identified during the pre-installation testing phase.

Important: The warranty is voided once the screen assembly has been fully installed onto the device. Any claims for defects or non-functionality must be made within 3 days of receiving the product and before installation.

10.2 Customer Support

For any questions, concerns, or warranty claims regarding your product, please contact the seller, GwayFix Online Store, directly through the platform where you made your purchase. Provide your order number and a detailed description of the issue, along with any relevant photos or videos.