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HP ProBook 645 G4 Notebook PC

Hello, please I need urgently to be assisted less I won't be able to submit some important documents. My laptop went on hybernate and I used the power botton and F6 which I always use, when it came on it said its updating form ware, it finished updating and refused to come back on. It shows lights on the keyboard, then on the caolocks, the fan switches on the it goes back off. 

 

Anyone with solutions that does not requires me going to the technician? 

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