Sony Vaio (VPCEB34EN) won't boot, Shows black screen Power LED stays Green

1. Removed battery and waited for 2-3 hours and put it back.
2. Checked with external LCD Screen but showing nothing.
3. Checked with direct power using adapter (without battery).

I searched lots of articles on Google and it seems that it is problem due to Video Card. Does it means my Motherboard has gone?

Update 1: I gave my laptop to repairing shop and they fixed it. They told that the problem was due toGraphics Chip. and they told that they did Reballing of Video Chip, charged thousand rupees (Indian Currency) it worked fine and now it is running as before.

Update 2: It worked about 15 days without any problem after that now I am facing the same problem again.I gave the laptop to the same shop they clearly didn't specified why the problem is coming but they told to change the motherboard. Please suggest What Should I do now?

Update 3 : I gave my laptop to Sony Service Center and they fixed it. They told that the problem was due to LCD Cable. and they told that they have changed the old one and now I am guessing that I was fooled previous time when I gave it to the earlier shop. I don't know for how many days but now it is working fine.

Update 4 : Well, as I was guessing the problem was not solved it happened again after one month and gave my laptop to Sony Service Center and they said that You Mother-board has gone bad. and it will costs up Rs. 13000 near about.

Update 5 I did some internet research and done some experiments on my motherboard. I took my motherboard out and heated using Hot Air Gun for 30-50 Seconds and then I fixed in the laptop. Now Laptop is working good using external monitor but Laptop LCD display still goes blank. Please somebody tell me is it motherboard or LCD problem ?

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Reapply default security settings

1. Open Security Configuration and Analysis.
   
2. In the console tree, right-click Security Configuration and Analysis, and then click Open Database.
   
   Where?
   
   
   • ConsoleRoot/Security Configuration and Analysis
     
3. In File name, type the file name, and then click Open.
   
4. Do one of the following:
   
   
   • For a domain controller, in the console tree, right-click Security Configuration and Analysis, click Import Template, and then click DC security.
     
   • For other computers, in the console tree, right-click Security Configuration and Analysis, click Import Template, and then click setup security.
     
5. Select the Clear this database before importing check box, and then click Open.
   
6. In the console tree, right-click Security Configuration and Analysis, and then click Configure Computer Now.
   
7. Do one of the following:
   
   
   • To use the default log specified in Error log file path, click OK.
     
   • To specify a different log, in Error log file path, type a valid path and file name, and then click OK.
     
8. When the configuration is done, right-click Security Configuration and Analysis, and then click View Log File.
   

Important

• Applying the entire setup security template is a drastic measure that should be avoided. Instead, use the secedit command-line tool to apply default settings for specific areas. See the Using a command line section of this procedure.
  

Notes

• Different permissions are required to perform this procedure, depending on the environment in which you reapply default security settings:
  
  
  • If you reapply default security settings to your local computer: To perform this procedure, you must be a member of the Administrators group on the local computer, or you must have been delegated the appropriate authority. If the computer is joined to a domain, members of the Domain Admins group might be able to perform this procedure. As a security best practice, consider using Run as to perform this procedure.
    
  • If you reapply default security settings to a computer that is joined to a domain: To perform this procedure, you must be a member of the Domain Admins group or the Enterprise Admins group in Active Directory, or you must have been delegated the appropriate authority. As a security best practice, consider using Run as to perform this procedure. For more information, see Default local groups, Default groups, and Using Run as.
    
• To open Security Configuration and Analysis, click Start, click Run, type mmc, and then click OK. On the File menu, click Open, click the console that you want to open, and then click Open. In the console tree, click Security Configuration and Analysis.
  
• The default path for the log file is:
  
  systemroot\Documents and Settings\UserAccount\My Documents\Security\Logs\
  
• When you reapply default security settings, all settings that are defined in Setup security.inf are set as the template specifies, but other settings that are not defined in the template may persist. For more information, see Applying security settings.