Chosen Solution
I have a Macbook Pro Mid 2009 13”. After I saw the “No hardware installed” I decided to buy and change the airport card. When I changed it I put everything back and the screen now don’t turn on. Is there a possibility that replacing the card damaged the screen?
Most likely you pinched the cable or didn’t install the connector properly when you plugged it back into the logic board damaging it. Review this IFIXIT guide to see what you may have done: MacBook Pro 13" Unibody Mid 2009 AirPort Antenna Replacement
