Introduction

This repair guide provides step-by-step instructions for replacing the keyboard of the ASUS Chromebook C300M-BBCLN12 keyboard. The repair may be required if the keyboard is no longer functional.

Remove the eight 9.0mm PH00 Phillips screws along the perimeter of the bottom housing. Remove the three 6.0mm PH00 Phillips screws from the center of the bottom housing. Remove the three 6.0mm PH00 Phillips screws from the center of the bottom housing.
  • Remove the eight 9.0mm PH00 Phillips screws along the perimeter of the bottom housing.

  • Remove the three 6.0mm PH00 Phillips screws from the center of the bottom housing.

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Separate the palm rest assembly from the bottom housing using the plastic opening tool. It is recommended that you start from a corner and run the tip of the plastic opening tool along the edge of the housing. Lift the palm rest assembly slowly to prevent damaging the two cables connecting it to the motherboard.
  • Separate the palm rest assembly from the bottom housing using the plastic opening tool.

  • It is recommended that you start from a corner and run the tip of the plastic opening tool along the edge of the housing.

  • Lift the palm rest assembly slowly to prevent damaging the two cables connecting it to the motherboard.

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Flip back the hinges on the connectors that secure the wide black cable and the narrow white cable using the tweezers. Disconnect the wide black cable from the motherboard by pulling the blue cable tab straight out of the connector. Disconnect the white ribbon cable from the motherboard by pulling the blue cable tab straight out of the connector.
  • Flip back the hinges on the connectors that secure the wide black cable and the narrow white cable using the tweezers.

  • Disconnect the wide black cable from the motherboard by pulling the blue cable tab straight out of the connector.

  • Disconnect the white ribbon cable from the motherboard by pulling the blue cable tab straight out of the connector.

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Flip back the hinge on the connector that secures the white ribbon cable to the underside of the palm rest assembly using the tweezers. Disconnect the white ribbon cable from the palm rest assembly by pulling the cable straight out of the connector. Disconnect the white ribbon cable from the palm rest assembly by pulling the cable straight out of the connector.
  • Flip back the hinge on the connector that secures the white ribbon cable to the underside of the palm rest assembly using the tweezers.

  • Disconnect the white ribbon cable from the palm rest assembly by pulling the cable straight out of the connector.

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Remove the palm rest assembly from the bottom housing and lay it on a flat surface with the keyboard facing downward. Remove the four 5.0mm PH00 Phillips screws securing the keyboard to the palm rest assembly. Separate the keyboard from the palm rest assembly.
  • Remove the palm rest assembly from the bottom housing and lay it on a flat surface with the keyboard facing downward.

  • Remove the four 5.0mm PH00 Phillips screws securing the keyboard to the palm rest assembly.

  • Separate the keyboard from the palm rest assembly.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

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