Chosen Solution
My MBPro will not respond to the power button at all. No lights, no sounds. Simply an unlit screen. The power adapter LED, however, appears to be working normally. It begins green and then turns to orange to suggest it is charging the battery. Two months ago the battery indicator indicated I should ‘service battery’. Could a dead or otherwise problematic battery be the cause?
Most likely yes! Sadly the way to tell was using the built-in battery tested the older models had (your’s doesn’t have one). If the testers LED were green then we know the battery was good and the logic board had a problem. Here you could have either a bad battery or the charging logic on the logic board was damaged. Do make sure your MagSafe charger cord is not damaged often I see this as the root cause of the damage within the system. Given the age of the system I would recommend visiting an Apple Store to see what they say.
