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there is some thing wrong with the lid cover.just i open it the device start working automatically

Hello, This may be because the BIOS needs updating (Flashing). Steps: http://www.wikihow.com/Update-Your-Compu… Do this and please let me know whether this has helped,

In the BIOS you can disable this function. I had this feature for a while. There an option like costumization. There you can add that what to do when the lid opens. Press F2 to go to BIOS when you start the machine.