My tablet is not turning on.

I tried to turn it on, but it just lighten the screen up, and after that, it become dark. This happen after I took it with me to school in my backpack without a case. During school period, sometimes the tablet would work, and sometimes it would stop working. When the tablet stop working, I put it in my bag, carried it to my other class, and it would work, but it would turn off suddenly after I move to another class.

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Could you please be a little more specific? I can't tell what happened that made it like this. It just stopped working?

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Their is only one crack on the tablet under the screen, And how would you like me to be more specific. I was roughly dropping my backpack/careless, and somehow it didn't work. However, when I repeated the same thing I did, it worked. I believe their is a system that is loose and need to be adjusted properly. So can you possibly tell me what happening.

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