HP ProBook 4510s with keyboard issue

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  • Awejire
    Member
    • Mar 2022
    • 24
    • Nigeria

    #1

    HP ProBook 4510s with keyboard issue

    Hello guy, i have this HP ProBook 4510s with board number 6050A2252601-mb-A03 the QWERTY ZXCVBNM are not pressing i tried several other new keyboards on it, it's the same keys that are not pressing too I tried checking the Port connecting it to the motherboard it looks normal and i even tried to clean it but still same issue. Any idea?
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14086
    • Canada

    #2
    Re: HP ProBook 4510s with keyboard issue

    See attached and below.

    http://www.learningaboutelectronics....%20read%20high.

    The keyboard is scanned for a keypress.

    Review the activity of an OUTPUT & INPUT pin from the KBC on a known good key press.

    Then confirm the receipt of a keypress from the non-working row. Suspecting a connection break for this row of keys.

    Confirm that each pull-up resistor is present & its resistance value for the keyboard.
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