Samsung Galaxy S26 Ultra Charging Port Replacement
A failing charging port on the Samsung Galaxy S26 Ultra can cause intermittent charging, failure to establish USB data connections, slow charging warnings, or lower microphone audio issues. Replacing the modular daughterboard restores the USB Type-C connector, primary microphone, and lower antenna connections to factory condition. This repair requires heating the back cover, removing internal shielding, and swapping the sub-board assembly.
Required Tools
- Heat gun or heating pad
- Suction handle
- Plastic opening picks
- ESD-safe plastic spudger
- Precision Phillips #00 screwdriver
- Tweezers
- SIM card eject tool
- Isopropyl alcohol (90% or higher)
- Replacement pre-cut rear adhesive
Step by step
- 1
Step 1: Power Down and Eject SIM Tray
Turn off the phone completely and remove the SIM tray using a SIM eject tool.
Never perform internal repairs while the device is powered on.
- 2
Step 2: Heat the Back Glass
Place the device on a heating pad set to 75°C to 80°C or apply moderate heat around the perimeter using a heat gun for two to three minutes.
This softens the factory adhesive holding the rear glass panel in place.
- 3
Step 3: Slice the Perimeter Adhesive
Attach a suction handle to the lower portion of the rear glass and lift gently to create a small gap.
Insert a thin plastic opening pick into the seam and carefully glide it along the edges to slice through the adhesive, keeping the pick depth under 5 mm to protect internal components.
- 4
Step 4: Remove the Back Glass
Gently lift the back glass panel away from the frame once all perimeter adhesive has been separated.
Set the glass aside in a clean, dust-free area.
- 5
Step 5: Remove the Wireless Charging Coil and Upper Shield
Use a Phillips #00 screwdriver to remove the screws securing the upper motherboard shield and integrated wireless charging coil.
Unclip and remove the coil assembly to gain full access to the board connectors.
- 6
Step 6: Disconnect the Battery
Use an ESD-safe plastic spudger to pry the primary battery connector straight up from the motherboard.
Disconnecting power immediately eliminates the risk of short circuits during the remainder of the repair.
- 7
Step 7: Remove the Loudspeaker Assembly
Remove the Phillips #00 screws holding the lower speaker module over the charging daughterboard.
Lift the speaker housing out of the chassis and set it aside.
- 8
Step 8: Disconnect Interconnect Cables and Antennas
Use your spudger to pry up the main motherboard-to-daughterboard interconnect flex cables and detach any coaxial antenna connectors.
Move the disconnected ribbons gently to the side to clear the workspace.
- 9
Step 9: Remove and Replace the Charging Daughterboard
Remove the single securing screw on the daughterboard, then gently lift the faulty board out of the chassis.
Seat the new replacement daughterboard into place, ensuring the USB-C port aligns with the bottom frame gasket, and reinstall the securing screw.
- 10
Step 10: Reconnect Cables and Reinstall Speaker
Snap the interconnect flex cables and antenna connectors back onto the daughterboard until you feel a firm click.
Place the loudspeaker assembly back into position and secure it with its Phillips screws.
- 11
Step 11: Reconnect Battery and Run Functional Tests
Reconnect the battery flex cable, power on the phone, and plug in a USB-C charger to confirm Super Fast Charging and data transfer work properly.
Test the lower voice microphone using a voice recording app before final assembly.
- 12
Step 12: Reseal the Rear Glass
Turn off the phone, clean off any remaining adhesive residue along the frame using isopropyl alcohol, apply a fresh pre-cut adhesive strip, and press the rear glass firmly back onto the frame.
Disclaimer: repairs are done at your own risk. Devices contain batteries and live components; improper handling can cause injury or fire. For a safe, warrantied repair, contact us.
Prefer to leave it to the pros?
Frequently asked questions
Yes. The primary voice microphone and lower antenna terminals are physically built onto the charging daughterboard, so replacing the board fixes faults in those components as well.
Opening the device breaks the factory waterproof seal. Applying fresh pre-cut adhesive provides everyday dust and splash resistance, but the device should no longer be submerged in water.
Ensure no liquid or flux residue is present in the new port. Clean the socket with high-concentration isopropyl alcohol, inspect the pins with a magnifying glass, and allow it to dry completely before retesting.
The USB-C socket is micro-soldered directly to the daughterboard. Replacing the entire sub-board is the standard, reliable repair method that avoids complex hot-air soldering.
When to Choose DIY Repair vs. Professional Electronic Device Repair?
Our free repair guides help you troubleshoot simple issues at home. Whether you want to know how to handle minor software glitches or basic maintenance, we provide step-by-step instructions. However, complex tasks like an iPhone screen replacement, battery replacement, or fixing a device that won't charge often require specialized tools and expertise.
Expert Phone Repair in Ljubljana and Maribor
If you are facing severe hardware issues—such as water damage, a laptop overheating, or an electric scooter that won't turn on—it is safer to rely on professional technicians. KRON Servis is your trusted partner for phone repair Slovenia, offering reliable services in two major cities: phone repair Ljubljana (Vilharjeva cesta 29) and handy reparatur Maribor (Zagrebška cesta 83a).
We specialize in a wide range of services, including laptop repair, computer service, PS5 and gaming console repair, TV repair, and household appliance servicing. We use OEM parts to ensure the highest quality, and every repair comes with a 12-month warranty. Diagnostics are priced at €30 including VAT.
Check our pricing page for details, track your repair status online, or reach out to us directly via our contact page for professional assistance.