My laptop stop working all of a sudden
How would I know if my laptop still under warranty and why it stop charging and power on all of a sudden?
MacBook Air
Warranty
Click in the menu bar.
About This Mac > More Info..
Click "Services" tab at the top, then click the arrow beside
"Check my services and support status".
Battery charger
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".
If this does not help, contact Apple.