Introduction
Use this guide to replace the motherboard on your Samsung Galaxy Watch4 Classic.
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Before starting repairs, take your watch off the charger and power it down.
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Remove the watch band.
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Use a Tri-point Y00 screwdriver to remove the four 4.0 mm-long screws securing the back cover.
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Insert an opening tool into the seam between the back cover and the metal housing.
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Twist the opening tool to create a gap.
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Lay the watch face down.
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Carefully swing open the back cover by folding it to the opposite site of the created gap.
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Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.
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Use the pointed end of a spudger to disconnect the hall sensor flex cable.
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Use a spudger to disconnect the display flex cable.
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Use a spudger to disconnect the crown button flex cable.
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Use a Phillips screwdriver to remove the 4.4 mm-long screw securing the motherboard.
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Use your fingers to lift the motherboard out from the watch assembly towards the bottom of the watch.
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If possible, turn on your device and test your repair before resealing.
To reassemble your device, follow these instructions in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
