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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?


3 Solutions
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.
mlitinAuthor 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
mlitinAuthor 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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