01-09-2013 06:04 PM - last edited on 07-23-2013 12:08 PM by AmandaM
Welcome to the Sony Community.
Try performing all the steps mentioned here to troubleshoot the issue: https://us.en.kb.sony.com/app/answers/detail/a_id/
You can view the steps about removing and reseating the Random Access Memory (RAM) Module in the User Guide for your computer. Use the exact model # of your computer here to have the User Guide for the same: http://esupport.sony.com/US/p/select-system.pl?DIR
If the issue persists, contact Sony Service Assistance Team here: http://esupport.sony.com/US/p/service.pl
Note: If my post answers your question, please mark it as an "Accepted Solution."