Mac won't power up?
Why is there an orange light on the mag connector?
MacBook Air
Why is there an orange light on the mag connector?
MacBook Air
Go step by step and test.
http://support.apple.com/kb/TS1365
Note: Steps 5 and 6
Step 5
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
Mac won't power up?