Introduction
This guide shows how to remove the motherboard and earpiece speaker in your HMD Pulse Pro smartphone.
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Firmly press a SIM eject tool, bit, or straightened paper clip into the SIM card tray hole on the left edge of your phone until the tray ejects.
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Remove the SIM card tray.
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Insert the tip of an opening pick between the back cover and frame, at the SIM card tray cutout.
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Position the opening pick straight down and slide it along the left edge to begin unclipping the back cover.
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Continue sliding the pick around the perimeter of your phone until the back cover is fully unclipped.
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Carefully flip your phone over so the back cover is facing up.
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Lift the back cover off the frame and flip it over the left edge of your phone, laying the cover flat on your work surface.
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Use a Phillips screwdriver to remove the nine 3.6 mm‑long screws securing the motherboard cover.
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Insert an opening pick between the right edge of the motherboard cover and frame.
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Twist the pick to fully unclip the cover.
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Use the flat end of a spudger to pry up and disconnect the battery press connector from the bottom edge of the motherboard.
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Use the flat end of a spudger to pry up and disconnect the back cover press connector from the bottom edge of the motherboard.
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Use the flat end of a spudger to pry up and disconnect the display cable press connector, next to the battery cable.
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Slide one arm of a pair of tweezers under the metal neck of the black antenna cable's connector head, near the top right corner of the motherboard.
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Lift straight up to disconnect the cable.
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Insert the flat end of a spudger under the top edge of the front camera and gently lift it out of its recess.
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Use the point of a spudger to pry up the bottom right corner of the motherboard until it unclips.
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If the board still feels stuck in place, use the spudger to pry up the top edge.
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Lift and remove the motherboard.
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The front camera may have disconnected from the bottom of the board during removal. If it did, reconnect its press connector.
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Make sure the two press connectors on the bottom edge and the antenna cable on the right edge are out of the way so they don't get trapped underneath the board.
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Lower the board into its recess and press down on the edges to clip it into place.
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Use the flat end of a spudger to scrape off any large chunks of thermal paste from the bottom of the motherboard.
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Use a pipette or syringe to apply a drop of isopropyl alcohol (>90%) to the thermal paste residue.
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Wipe away all the residue with a coffee filter or lint-free cloth. Wait one minute to allow the alcohol to completely dry.
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Apply a small bead of thermal paste to each of the four plus (+) signs that are lightly engraved in the frame.
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Use a spudger to pry up the earpiece speaker from the bottom edge of your phone.
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Remove the speaker.
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Remove the plastic liner from the earpiece speaker adhesive on the screen and frame assembly.
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Push the speaker into place so the raised ends of its metal contact arms are on the bottom edge.
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Use tweezers to carefully remove the layer of foam adhesive from the perimeter of the earpiece speaker's underside.
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Discard the adhesive—it can't be reused.
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To reassemble your device, follow these instructions in reverse order.
