When I press one key on my Dell Vostro 15 5568 laptop keyboard, other keys are also pressed automatically. For example, when I press the Alt key, 0 and 1 appear, and when I press Num Lock, the keys Q, W, E, and R are triggered.
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@ahadraza this looks and sound like a failed keyboard. This model integrated the keyboard into the top cover (palmrest) and it is the best way of replacing the keyboard. Yes, you can also try to remove the original keyboard from the palm rest, by breaking of the plastic rivets that connect the keyboard to the palmrest. After that, you would need to install a replacement by substituting small screws for the plastics rivets. You will also need additional adhesive. Using screw's and adhesive is not always sufficient to provide a stable keyboard.
Personally I would install a palmrest with the integrated keyboard. It's a bit more expensive but a whole lot easier to replace and it will look and function professional. or now, you can always use a USB keyboard and let us know if that functions properly.
Use the Vostro 15 5568 Manual page 42, to work on this.
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