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Many Acer 15" Chromebooks use the same keyboard, including the C910, CB3-431, CB3-531, CB5-571 and possibly others, although the palm rest assembly is the same only on the CB3-531.
There are new keyboard-only replacement parts for sale, but using them requires melting off or otherwise removing the head of approximately 58 plastic retaining pins, then figuring out how to re-secure them. That kind of replacement is beyond the scope of this guide, so we'll only be dealing with a replacement that comes with a keyboard + palm rest as a single unit as pictured above.
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Using the Phillips #1 screwdriver, remove eighteen 7 mm screws from the back panel of the device.
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Push on the sides of the connector with a plastic spudger to separate the cable from the motherboard.
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Using the Phillips #1 screwdriver, remove the two black 5.5 mm screws securing the battery.
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Firmly pull the end of the black wire attached to the Wi-Fi card upwards and remove it from the device.
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Repeat with the white wire.
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Deroute the black wifi wire from its slot in the palm rest.
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Deroute the white wifi wire from the slot in the palm rest.
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Pull the end of the display cable attached to the motherboard straight up to remove.
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Rotate the cable out away from the motherboard.
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Lift the palm rest assembly from the front then slide it away from the hinges slightly to remove the assembly from the display.
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Flip up the retaining latch securing the touchpad cable to the motherboard.
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Carefully lift up on the keyboard ribbon cable and the insulating sheet immediately below it so the touchpad can clear them.
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Lift the touchpad slightly from the top.
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Pull the touchpad toward the motherboard as you continue to lift it, sliding it out from under the retaining fingers at the bottom.
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Pull the black ribbon attached to the speakers out of the motherboard.
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Peel the yellow tape off the black keyboard ribbon cable on the motherboard.
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Use a spudger to slide the black tabs on either side of the connector forward slightly.
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Pull the black ribbon straight towards you to remove it from the motherboard.
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Remove the metal plate over the motherboard.
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Remove the motherboard.
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Flip up the latch on the cable going from the I/O board to the LED board.
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Flip up the latch on the cable from the I/O board to the motherboard.
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Remove the single retaining screw securing the LED board.
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Remove the board.
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When reassembling, ensure the board is seated on the guide pin before reinstalling the retaining screw.
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The cable between the I/O board and the motherboard is lightly adhered to the plastic insulator on the keyboard. Pull up from the right to free the cable from the adhesive.
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The LED cable runs from the LED board to the I/O daughter card. It is lightly adhered to the keyboard. Remove it by gently pulling it away from the keyboard.
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All components have now been removed from the keyboard / palm rest assembly.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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