Re: Macbook pro 15.4 " running but screen is black ?? please help ??
The green light means there is power, the orange light means it's charging the battery.
What worries me is that you don't hear a chime. Even when you have something plugged into the headphone port, it should still chime. That chime tells you it has passed the hardware self test. No chime means there there something wrong with the motherboard, RAM or CPU. I hate to say it, but you need to take it to Apple at this point.
The green light means there is power, the orange light means it's charging the battery.
What worries me is that you don't hear a chime. Even when you have something plugged into the headphone port, it should still chime. That chime tells you it has passed the hardware self test. No chime means there there something wrong with the motherboard, RAM or CPU. I hate to say it, but you need to take it to Apple at this point.