New screen, power won't come on

I have a HP pavilion dv7. The screen got cracked. I have ordered a replacement screen based on the part number of the broken screen. I could not get the right hand connector so I was sent a left hand connector screen with a 40 pin connector cable. When I hook up the new screen the power will not come on. If I unhook the screen it will. It was working ring using a hdmi cable and my tv. Help me please.
 
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