Why does my mac book turns off unexpectedly?

I just bought a new Macbook Pro yesterday. It was all fine and 2day I wanted to put some of my old pics on the computer. I connected pendrive to the computer and then macbook went dark. I tried to turn it on and it started working again so I connected pendrive again and it turned off again. But this time it didn't wanted to turn on. I tried few times more but still it was off. I tried also all of the tips from the instruction. Please tell me what can I do !

DAKINGGOD wrote:
WHY DOES MY MAC BOOK PRO SHUT OFF ON ME?
Not much to work with here...
How about more info so a diagnosis and help can be formulated? Mac model (size), RAM, OS version, age, battery status? What are you doing when it happens? How often? And if you want to be really abundant, pertinent logfiles?

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