Internal Screen is blank; Rest of computer+external monitor works fine
I've got a macbook pro 2011 that i have been fixing up. I'm having a weird problem. The build in laptop screen will not turn on no matter what I do. However the laptop functions fine aside from that. When I plug in an external monitor, it works great. Stuff I have tried:
- Reset SMC
- Reset NVRAM/PRAM
- Go through all display options in control panel
- Apple Hardware diagnostic from bootup
- Boot in safe mode
- Boot to USB of older OSX version
- Boot without harddrive (screen still blank)
I know it isn't the screen, as I bought a working one. Also interestinging, the screen's camera works fine, as does all the airport/bluetooth stuff that attached through the monitor.
Any ideas? I don't understand why the external monitor would work fine but not the internal. It feels like it's not even hooked up (thought I checked the connector to the logic board many times).