Keyboard not working properly

Hi,
    I have a mac book pro.The keyboard is not working properly.
I have attached on screen keyboard screenshot.
I have also tried reinstalling OS also but not luck.

Please help to solve this problem.

LVL 5
Naranthiran DSystem AdministratorAsked:
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JohnBusiness Consultant (Owner)Commented:
You have reinstalled the OS so now you should replace the keyboard. You need to get the keyboard from Apple. If you have removed the keyboard at any time, check to be sure the cable is properly seated.
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Naranthiran DSystem AdministratorAuthor Commented:
Hi John,
            Will an external keyboard solve this issue?
Instead of replacing the keyboard in the mac book.
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JohnBusiness Consultant (Owner)Commented:
You can try a USB keyboard. Plug it in and then start up the computer.
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Tom GrellCOMMUNICATIONS SPECIALISTCommented:
The screenshot you posted shows the option key being pressed. I would check that neither of the option keys are stuck down.You could try gently prying the key tops off and cleaning under the keys. If it isn't a physical sticking of the key, then it is an electrical defect and the keyboard need to be replaced.
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serialbandCommented:
If the option key regiseters as depressed, then an external keyboard will not work.  Did you spill something on your keyboard?
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Naranthiran DSystem AdministratorAuthor Commented:
Thank you John..

I am able to login into the Mac Book using the external keyboard.
Thank you so much for helping.
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Naranthiran DSystem AdministratorAuthor Commented:
Thank  you so much.
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JohnBusiness Consultant (Owner)Commented:
You are very welcome and I was happy to help.
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