How do I fix black screen?
Here are the symptoms:
-When you press the power button, the screen flashes white twice, then stays black. Otherwise, everything else starts up normally with the chime and hard drive sounds, etc.
-Shining a flashlight to the screen shows it still works (just no backlight?)
-I've reset the PRAM, no go
-I've replaced the inverter board but that didn't work
-It does work with an external monitor attached
I am currently running an extended Apple hardware test to see if it brings up anything specific.
Could something on the logic board be bad?
Is this a good question?