My laptop won't start black screen

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Registration date
Monday May 9, 2016
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Last seen
May 9, 2016
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Hi
I have a lenovo y5070
I haven't used my laptop in months and now when I turn it on
It will start but the screen is black and nothing seems to function
It doesn't even show the lenovo logo at the start
And when I plug in/out the adaptor it makes a loud beep
Can somebody help me!!!
FYI
I cannot take out the battery