replacing broken digitizer and ipad wont charge

I recently received a ipad 3 with a broken screen and i went ahead and began to replace the digitizer. after plugging in the new digitizer i attempted to turn it on to make sure it worked before sealing it and got nothing i then attempted to charge it and even connect it to my pc and itunes wouldn't detect it. i disconnected the battery and let it sit and then attached it and tried again. is the logic board fried? is there anything i can do short of buying a replacement?

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