MacBook Pro Won’t Boot up

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Level 1

4 points

MacBook Pro Won’t Boot up

I have reset the SMC several times and I can’t get the MacBook Pro to boot up. It is plugged in (light is amber on the MagSafe) which is odd because is should have a fully charged battery. Any way the machine is unresponsive to the power key and it sounds like the fan is making a faint pulsing sound. Any ideas out there?

BTW.....I have held down the power key and connected the MagSafe cord and the machine will attempt to boot up however the fan runs at full speed and it won’t fully boot up and just goes into an endless cycle of start up attempts and never gets through the complete startup. The only way to stop this endless cycle of start up attempts is to just disconnect the MagSafe and the machine goes off completely with no signs of life.

MacBook Pro 15", macOS 10.14

Posted on Mar 29, 2019 7:40 PM

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Answer 1

Best reply

violintuck Author

Level 1

4 points

Mar 30, 2019 1:00 PM in response to HWTech

Ok....so it appears that I have resolved this issue, however I’m not exactly sure how.

After giving up for the evening I left the laptop plugged in overnight and in the AM the MagSafe light had turned green indicating a full charge.

The machine responded to the power button and I was able to boot up in ‘Apple Hardware Test’ mode. The test(s) revealed no issues. So this would leave me to the conclusion that the issue was software related.

Restarting the machine from ‘Apple Hardware Test’ mode worked and the machine immediately went into an automatic software update and so far appears to be operating normally.

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Answer 2

HWTech

Level 9

55,730 points

Mar 29, 2019 8:17 PM in response to violintuck

What is the exact model of the laptop? You can get this information by entering your serial number here.

See if you can run the Apple Hardware Test or Apple Diagnostic depending on the age of the laptop.

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Answer 3

HWTech

Level 9

55,730 points

Mar 29, 2019 9:58 PM in response to violintuck

Try an SMC reset and PRAM reset (hold the PRAM reset for at least 3 chimes or about a minute).

See if you can boot into Internet Recovery Mode by holding Command + Option + R just after the startup chime. If you can boot into Internet Recovery Mode, then you have a problem with the drive which could be hardware or software or a possible bad drive cable. Try running Disk Utility's First Aid while in Internet Recovery.

You can also try a Safe Boot. Booting using Verbose Mode, will display the startup log as it boots and may reveal something.