Can't type Z, arrows, question mark [Closed]

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Registration date
Monday June 12, 2017
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June 12, 2017
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why that i can't click my letter "Z" on the keyboard, "arrow keys", "question mark" and "INS keys" at the right side of my Toshiba Satellite. if you know what happen, please tell me what am i suppost to do.. my friend told me just click FN Keys once then click all of the missing parts then click FN keys again but it didn't work.. please help. my laptop is TOSHIBA SATELLITE L755-M1KV windows 7 but i upgrade it to windows 8.1 now .