Is laptop keyboard at blame?

I am servicing a client's laptop whose installed keyboard is delivering random characters along with the typed characters when typed  a normal rate, but shows much more accurately when types very slowly and deliberately.  If I connect a usb keyboard, typing is consistently accurate.  My assumption is that the installed keyboard itself is damaged and replacement is the solution.  Is there any reason to consider anything else?


Mark LitinOwnerAsked:
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From your description, that appears to be the case, i.e., the 'installed' keyboard is faulty.

Did you try updating the driver?
Unfortunately, I've seen this problem both ways - replacing the laptop keyboard fixes it, sometimes the new keyboard does not fix it, and sometimes the new keyboard fixes it for a little while and then the problem comes back.  In all those cases, an external keyboard worked great.  

So I would replace the keyboard (after trying the uninstall/install and driver upgrades) but I would not have confidence that it will solve the problem.  It might solve it and it might only solve it temporarily.

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Mark LitinOwnerAuthor Commented:
Thanks to both for the suggestions.  First the driver, then the keyboard.  I'll let you know how it goes.
you can always test the keyboard when running from a live cd, like Knoppix :
this will show if the problem comes from the installed OS or not
Mark LitinOwnerAuthor Commented:
Thanks all for your input.  

Not the keyboard or the associated driver.  Seems system related. Replaced keyboard with identical results.  100% OK with external keyboard, so laptop is now a desktop PC.

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