Few buttons in my keypad are not working

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I have bought dell Inspiron 15 5558. Few buttons in my keypad are not working. like numeric 5 & 6 from upper numbers, left ctrol key, numeric 8 from dial pad.
some times all work but now from past 3 days these buttons have stopped working. please help me . is there any driver issue or keypad connection problem?

1 reply

If it were a connection, or driver issue, then it would be more widespread than what you have indicated. Turn it off, and clean the keyboard with compressed air. It is more than likely a physical problem of debris in the keyboard.