Hat geantwortet auf: MacBook Pro White screen after repair?Perhaps the LED screen is not properly connected/faulty, or the video card gave up on you. Try connecting your laptop to an external display. Start it up, wait a few minutes (assuming it's loading up all the way to desktop) and then connect your external display. I've got a 13" macbook pro mid 2010 doing the same. Not sure if i'll be able to do anything about it (I dont want to buy a new logic board at $500) but at least I can use the laptop as a desktop computer.