Samsung Galaxy S20 Ultra SM-G988U Screen Replacement Guide!

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OVERVIEW:

This guide will walk you through the complete teardown and replacement process for the Samsung Galaxy S20 Ultra front screen and back glass. This repair involves transferring all internal components into a new LCD frame, ensuring a fully functional restoration. Whether your screen is cracked or your back glass is shattered, this tutorial will help you safely and precisely complete the repair. Follow each step carefully to avoid damaging delicate parts. Let’s get started with the tools and techniques needed for a successful repair.

See the official Samsung specs for this model

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REPAIR TIME & SKILL LEVEL:

This repair is estimated to take about 1 to 2 hours to complete and is of INTERMEDIATE difficulty, requiring careful handling of delicate components and proper application of heat to remove adhesive.

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STEPS:

Tools You Need

For this repair, you will need a heat gun for softening adhesive, plastic cards to lift the back glass safely, a Phillips screwdriver for removing internal screws, a pry tool to detach components, and isopropyl alcohol to help release glued parts. These tools ensure safe disassembly without damaging delicate internal parts.

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Apply Isopropyl Alcohol to Loosen Adhesive

• Apply isopropyl alcohol around the edge of the phone’s back panel.
• Let it sit briefly to start loosening the adhesive under the glass.
• This helps reduce resistance and damage when removing the cracked back.

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Heat the Back Panel

• Use a heat gun to warm up the edges of the back glass.
• Heat softens the adhesive for easier separation.
• Aim for consistent motion to avoid overheating a single spot.

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Pry Off the Back Glass

• Insert a plastic card or pry tool into a corner of the heated back panel.
• Gently work your way around the frame to lift the cracked glass.
• Be cautious near the camera area and remove a small part to be reused.

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Remove All Phillips Screws

• Unscrew all visible Philips screws securing internal components.
• This includes the screws for the NFC pad, speaker, and frame brackets.
• Keep track of all screw locations for reassembly.

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Remove NFC Wireless Pad and Top Components

• Gently detach the NFC wireless charging pad.
• Also remove the top speaker and any adjacent connectors.
• Ensure not to tug on cables that are still connected underneath.

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Disconnect the Flex Cables and Antenna

• Unclip the antenna cable, main board flex, and LCD flex from the board.
• Use a plastic tool to lift each connector cleanly off its socket.
• Keep a note of where each cable connects for later.

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Remove the Loudspeaker Assembly

• Use a pry tool to lift and remove the loudspeaker module.
• It may be tightly adhered—apply slight pressure if needed.
• Avoid forcing it out, as the speaker casing can crack easily.

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Unscrew and Remove the Charging Port Assembly

• Locate and remove the screws holding the sub-PBA (charging port).
• Carefully lift the board assembly away from the housing.
• Be gentle with the connected flex lines beneath.

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Remove the Logic Board and Camera

• Detach all connections leading to the main board, including antenna lines.
• Carefully remove the logic board, which includes the rear camera.
• Set the board aside safely to avoid static damage.

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Remove the Battery

• Flip the phone and apply heat to the front screen area.
• Use a curved pry tool and isopropyl alcohol to loosen the battery glue.
• Gently pry out the battery without bending or puncturing it.

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Reinstall Loudspeaker and Battery in New Frame

• Place the ringer/buzzer unit into the new LCD frame.
• Insert and align the old battery if your replacement does not include one.
• Ensure components sit flush in the housing.

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Install Top Speaker and Main Board

• Place the top speaker and reconnect it properly.
• Align and install the logic board with the camera into the frame.
• Reconnect all necessary flex and antenna lines.

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Install Charging Port and Secure with Screws

• Insert the sub-PBA and screw it back into place.
• Ensure the board sits correctly and connects to the main board.
• Double-check for firm, complete connections.

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Reconnect the NFC and Antenna Covers

• Replace the NFC wireless pad and antenna shield covers.
• Align metal brackets and snap them in before reapplying screws.
• Tighten all screws to restore internal structure.

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Reattach the Back Glass

• Transfer the small camera module piece into the new back glass.
• Align and press the back panel onto the new frame.
• Apply gentle pressure to ensure a snug fit with the new adhesive.

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Power On and Test Device

• Insert the SIM tray and power on the phone.
• Verify that all components work, including display, sound, and charge.
• Ensure a tight seal all around the device to prevent dust ingress.

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CONCLUSION:

Replacing both the screen and back glass on the Galaxy S20 Ultra is possible with the right tools and a steady hand. This guide walked through transferring internal parts into a new frame and restoring the exterior. Although the steps require patience, the result is a fully functioning and refreshed device. Always test your device thoroughly after repair. If you’re uncomfortable with any step, professional help is a great option.

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VIDEO TUTORIAL:

Looking for a more in-depth tutorial? Check out our complete teardown video for a detailed step-by-step walkthrough.

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MAIL-IN REPAIR SERVICE:

We offer professional screen replacement services. If you’re unsure about doing this repair yourself, send your device to our expert technicians for fast and reliable repair.

https://tekdep.com/device-repair/

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SHOP PARTS:

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SHOP TOOLS:

Using precision tools ensures a safe and efficient repair. Always use the right tools to prevent damage to delicate components.

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HAVE QUESTIONS?

If you have any questions, leave them in the comments below. Our community and team will be happy to help!

• Phone: 818-456-4479
• Email: support@tekdep.com

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