Mac Book Air Battery Diagnostic at Startup
If the MacBook Air's diagnostic LED displays five flashes upon startup, and the pattern repeats after a brief pause, the computer's battery may require service. If the power adapter is connected to a working power source, the MacBook Air will continue to start up normally; however, the battery should still be serviced.
This 5-flash LED diagnostic may also occur when waking the computer from sleep if the power adapter is connected and the battery requires service. This is intended to indicate a defective battery while still accommodating continued operation until it can be serviced.
Diagnostic Flash Sequence:
- Sleep indicator light is solid. This confirms that the unit is receiving power, even though the system has no video.
- Sleep indicator light flashes five times to indicate a battery failure.
- Sleep indicator light returns to solid status. Again, this indicates that the system is powered, even though video and battery power are not available.
Useful Knowledge Base articles:
Was this article helpful?
Get All The Support And Guidance You Need To Be A Success At Using Your MAC. This Book Is One Of The Most Valuable Resources In The World When It Comes To The Tips And Tricks Of Having Fun With MAC.
Get My Free Ebook