not restarting after battery replacement

I have replaced the battery in my ipad 3 4G following your instructions. now when i try to start it I either get a black screen with white apple or I get a notice that says slide to power off at the top of the screen and a cancel with an X button at the bottom. it will not do anything else

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Either digitizer cable not plugged in properly, the connector on the logic board damaged, digitizer cable ripped or digitizer went faulty due to user error.

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