Samsung Galaxy S8 Active I/O Daughterboard Replacement

Insert the SIM card ejector tool or unfolded paperclip into the small hole on the left side of the top edge.

Press gently to avoid damaging the device.

Eject the SIM tray and remove it from the phone.

• Reinsert the SIM card tray with gold contacts up and notch at bottom right.
• Gently press the SIM card into its slot until secure.

Removing the back cover may compromise waterproof seals — ensure you have replacement adhesive or avoid liquid exposure during reassembly.

• Remove four 3mm black screws using a TR6 Torx Security Screwdriver, located on the outside edges.
• Take off the rubber bumpers from the top and bottom edges of the device.

Never apply too much heat, as this may damage the OLED display, battery, or other internal components.

• Use a heat gun or other approved heating tool (iFixit iOpener, hair dryer, hot plate) to lightly warm the back edges for approximately one minute.
• Heat should soften the adhesive connecting the back cover to the frame without overheating the device.

Insert a Jimmy tool under the edge of the back cover.

A suction handle will not provide grip due to the back cover's texture.

• Insert an opening pick into the seam to prevent accidental closure, if the Jimmy tool is removed or slips.

Slowly cut around the top section of the device, avoiding cables for the fingerprint sensor and camera. Do not pry too far to protect the fingerprint sensor.

• Slide the Jimmy tool down the sides, separating the adhesive.

Use a opening pick to cut through any remaining adhesive.

• If using replacement adhesive strips, remove excess adhesive from the device frame with the Jimmy tool.
• Open the back cover slightly to expose the fingerprint sensor flex cable connector.
• The fingerprint sensor cable is near the front-facing camera; gently pull off the back cover to avoid damaging it.

Set the cover aside, resting on top of the device.

• Use a spudger with the flat end to disconnect the fingerprint flex cable.
• Remove the back cover.

When reconnecting, ensure the back cover is angled for proper alignment.

• Use a spudger to snap the fingerprint sensor cable in place by pressing straight down gently.

• Remove 11 3.5 mm screws with a Phillips #00 Screwdriver.
• Next, remove 2 2mm screws using the same Phillips #00 Screwdriver.

Use the flat end of a spudger to remove the NFC antenna and charging coil assembly.

Remove the loudspeaker assembly with the flat end of a spudger.

Remove the 3.5 mm screw with a Phillips #00 screwdriver.

Use the flat end of a spudger to disconnect the headphone jack flex cable.

Insert the Phillips #00 Screwdriver into the headphone jack on the device's bottom edge.

• Gently push the screwdriver upwards to eject the headphone jack.

Use a spudger to disconnect the battery flex cable with its flat end.

Remove the 3.5mm screw with a Phillips #00 Screwdriver.

Disconnect the Volume Up, Volume Down, and Bixby button flex cable using the flat end of a spudger.

Use the flat end of a spudger to disconnect the display flex cable.

Disconnect the charging port flex cable with a flat-end spudger.

Disconnect the black and white antenna cables using the flat end of a spudger.

Locate the flex cable connecting the motherboard to the daughterboard.

Careful: The flex cable can be damaged easily.

• Gently pry the flex cable away from its connection using a flat spudger.

Position the flat end of a spudger on the top edge of the motherboard.

• Pry up and remove the motherboard carefully.

• Remove five 3.5mm screws with a Philips #00 screwdriver.

Use the flat end of a spudger to disconnect the black and white cellular antennas.

Use the flat end of a spudger to detach the flex cable connected to the charging port.

The flex cable may be lightly glued to the device's frame with a small amount of adhesive.

From the center of the I/O daughterboard, carefully lift it upwards with the flat end of a spudger.

• Lift and remove the I/O daughterboard.