Introduction
If you find yourself on this guide, it means you are experiencing abnormal functioning of your device. This could mean that it is shutting off unexpectedly or it is taking a long time to restart once powered down. This guide will take you through the steps of replacing the motherboard. But first, you will have to remove the touch screen in order to get to the motherboard ( steps are attached for touch display removal).
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Microwave the iOpener for about 30 seconds. Then place it on top of the screen, and let it sit for about 2 minutes.
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Repeat this process a second to ensure that the glue is becoming loose.
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Alternative: Use a heat gun or hair dryer to heat up the glue
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Remove brown copper tape with the FPC (not clipped). Removing of the copper tape is necessary, I didn't find a way to avoid it. Try to remove the copper tape as gentle as possible to reuse it.
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Also remove green tape with angled tweezers and unclip in a 2nd step the FPC from the board
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Unscrew the three 1 mm screws around the perimeter of the motherboard
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with the 2nd screw also the light senor will come of the PCB
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Use the reverse tweezers to gently pull on the silver box on top of the motherboard to remove it from the back cover.
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Alternative: Use a plastic card in between PCB and cover.
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Locate the wire connector on the motherboard. Slowly release the wires by gently pulling with the blunt tweezers.
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To reassemble your device, follow these instructions in reverse order.
I have a 820 is the same process used?
Gary Roy Hogg -