Einleitung
This guide will walk you through the steps to remove the motherboard from your LG CU400. It will help remove the battery, the lower half casing, and the actual removal of the motherboard from the phone casing. Before doing this, be aware that you will be unable to use your phone until the replacement is complete. You should also be careful when handling the motherboard because it has delicate wires extending from it.
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To remove the battery, grasp the top front edge of the battery and pull the battery away from the phone.
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Remove the sim card by sliding the card out from under the retainer using either your fingers or a spudger.
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Remove the six 3mm #000 flat Phillips head screws from the back of the phone using a Phillips #000 Screwdriver.
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Insert the metal spudger between the keypad assembly and back cover assembly and pry the two assemblies apart.
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Work your way around the perimeter of the phone with the metal spudger to separate the two assemblies.
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Once you have worked your way around the perimeter of the phone, you will have access to the components in the bottom half assembly.
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You should notice that the number pad is loose and can simply be taken out of the open phone casing.
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Using the spudger, start to gently pry the motherboard from the back of the phone and work your way around the perimeter of the motherboard.
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Use tweezers to grab the black piece that these wires are attached to and simply pull it off the motherboard.
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Grasp either side of the motherboard and gently lift it away from the phone casing.
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The motherboard should be completely free of the phone casing, and you should have what is shown in the pictures.
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To reassemble your device, follow these instructions in reverse order.
