Phone open but stays on the sumsung logo screen!

When I start my phone, it stays and stuck on the samsung logo screen as long as the batterie is alive! It does not go farther then that, I dont have acces to the main screen!

Do you think its a problem with the motherboard? Thank you for your help!

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does the phone start to boot as soon as you put a charged battery into the device? If so the description is consistent with a bad lock button

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