1 Why my Mac doesn't turn on?
My MacBook air suddenly started to show problems during startup from few days ago. At first it did start when I did the SMC reset or PRAM. The next day the problem seemed to have increased. It started to turn on only after 5 to 10 minutes after powering it on. I even did reset the factory settings , also reinstalled the OS, but everything went in vein. After two days it completely stopped working.
If you can lets see what the onboard diagnostics tells us. Restart your system and press the D key
Reference: Mac startup key combinations Let us know what the error message if you got one.
The second test I would do is check the battery and the charging logic. Install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see iFixitでの質問に画像を追加する方法
Dan さんによる