Nintendo 3ds xl not turning on after hinge and housing replacement

My son cracked the hinge on his 3ds xl. It was still working fine. My husband decided to purchase the housing and hinges, so he can repair the hinges and give it a new look, since it was very beat up. He finished everything put it together and now the thing will not come on. We thought it was maybe because it needs charge, so we left it charging all night. We tried it again this morning, and it won't come on still. Is there anything that we are missing? What could be causing this problem? We wanted to give it back to out son as a surprise for christmas, and just need to see what to do to have it come on.
Asked Dec 08, 2015

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