Laptop turned on but doesn't display anything even drive-in-use LED is off

[Shoaib75]

hello gentlemagentlemen,
I have LENOVO R61e thinkpad
My laptop was working normally up to last day but today when I turned it on display doesn't starts and even from keyboard nothing can input, I tried to remove battery and then turned it on but same problem. Even drive-in-use LED is not on. Can anyone explain me what happens it is??? How to fix it...

 

[rgd1101]

MERGED QUESTION
Question from Shoaib75 : "When I start computer drive-in-use light is off and display doesn't show anything... Only battery is starts?"

Hii plz help me
When I start my computer,display remains blank only battery is starts but drive-in-use light is off? What is the problem?