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.

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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 Adding images to an existing question

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