03-01-2013 06:25 PM - edited 03-08-2013 02:44 PM
Follow the steps mentioned in the link provided by “Coolhunt” to troubleshoot the Keyboard issue.
To reset the BIOS follow the steps mentioned here: http://www.kb.sony.com/selfservice/documentLink.do?externalId=C1025393
To restore your computer to an earlier time when it was working fine: http://www.kb.sony.com/selfservice/documentLink.do?externalId=C1003813
If the issue persists, contact Sony Service Assistance Team here: http://esupport.sony.com/US/p/service.pl
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