2 
1 Black Screen, no chime, fan noise diagnosis
Got the good ol’ black screen upon boot. Tried all the common reset key shortcuts, tried removing the battery, tried different RAM configs, tried a different power supply, even tried the trick where you disconnect the fan, also waited for the battery to go dead - nothing.
how should I go about with the diagnosis? where do I begin? what are some parts that are likely to be related to this problem?
What happens when you plug in an external monitor?
What do you see when you shine a flashlight through the lid logo. Do you see the faint outline of your desktop and its icons?
由 Dan 完成的
Nothing, there's no chime and the fans spin at irregular speeds
由 Hans Ueli Und Franz 完成的