Einleitung
If your top speaker doesn't work then replacement may be the best option.
Werkzeuge
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Hold down the power button to turn off your device.
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Insert a pin, paper clip, or another similar object into the hole next to the micro sim card holder to remove it.
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Using plastic opening tools, pry open the bottom of the device.
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You will hear clicking sounds as the sides of the device detach from the screen.
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Once both sides are detached use the suction cup tool to remove the screen completely from the black casing.
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Remove the five 2.4mm screws located around the camera using a Philips head screwdriver to remove the plastic cover.
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Use the J000 Philips screwdriver to remove the screws and remove the PCB board and antenna.
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These are two 3.4mm Philips head screws found in the lower right corner of the phone.
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Pull out the power button flex cable using tweezers to disconnect from the phone.
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Use the tweezers to then disconnect the touch screen flex cable.
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Remove the battery connections to the logic board.
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This is the six pin connector seen in the red box.
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Pull the battery away to remove from the back of the screen.
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To reassemble your device, follow these instructions in reverse order.