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MS Natural Ergonomic Keyboard 4000 v1.0 model 1048,

Anonymous
2025-05-09T20:26:32+00:00

The # pad stopped working including the keys above the # pad, so basically all the keys right of PgUp & PgDn & the arrow keys do not work. All the rest of the keys are working OK .

Surface | Accessories | Surface mice and keyboards

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  1. Anonymous
    2025-06-20T07:11:33+00:00

    Hello,

    Welcome to the Microsoft community.

    Here's the troubleshooting for your MS Natural Ergonomic Keyboard 4000:

    1. Check NumLock:
      Press NumLock (test if light activates).
      Try pressing NumLock + Fn or NumLock + Shift (some models require combos).
    2. Connection Check:
      → Unplug/replug USB cable firmly at both ends (keyboard & PC).
      → Try a different USB port.
      → Test on another PC if possible.
    3. Debris Inspection:
      Turn keyboard upside down & gently tap near numpad.
      Use compressed air to clean around affected keys.

    Software Steps:

    1. Driver Reset:
      • Go to Device Manager → Keyboards → Right-click your keyboard
      • Select Uninstall device → Check "Attempt to remove driver" → Uninstall
      • Restart PC → Windows will reinstall drivers automatically.
    2. Keyboard Test:
      Open notepad and press:
      • Ctrl + Alt + Del (if works → partial functionality)
      • Alt + 64 on numpad (should type @ if working)

    Hardware Check:

    1. Cable Damage:
      Inspect the entire USB cable for kinks, bites, or fraying (common failure point).
    2. Circuit Test:
      If available, try a USB-to-PS/2 adapter (bypasses USB controller issues).

    If all steps fail:
    → Likely physical damage in the numpad circuit.
    → Consider replacement (this model is discontinued).
    → Contact Microsoft Support for legacy hardware advice.

    Note: Isolated numpad failure often indicates internal ribbon cable disconnect or circuit damage—especially in aged keyboards.

    Best regards,

    Huy-K | Microsoft Community Support Specialist

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