MacBook Pro 15" Unibody Mid 2012 Display
The same thing happened to me. I should have just had an expert do it. I was careful and got everything back where it was supposed to go. But when I turn it on then after a few minutes a blue screen appears and it resets. I retried connecting everything three times but still no luck. I was careful with the screws. The only thing I can conclude was that the screen connectors were damaged during the repair process.