LAPTOP PROBLEM -Lenovo G570 boot failure...didnt started after last shutdown

itsmatim

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LAPTOP PROBLEM -Lenovo G570 boot failure...didnt started after last shutdown....
the only response my laptop gives is the blinking of the white light inside the power button(on pressing the power button) for a few seconds.........


the problem occurred several times in the past....and some how or the other i escapd from it ,,,,,but this time nthng is damn working......some say that i should have removed any usb (such as data card), b4 turning off ...is this is the issue or some other problm ?


i removed the battery, unplugged the ac power, pressed power button for almost a minute...but i didnt work......the laptop is freezed from the past 48 hrs and nothng is really working,,,,pls help me out of this critical problem
 
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