MacBook Pro shuts down when starting up from battery

SohoSoho Said:

"MacBook Pro shuts down when starting up from battery: The charger is good. The computer starts when it is plugged and fully charged. I did NVRAM and SMC test. It just fails starting when the battery is not fully charged (sometimes). The battery has been replaced but the issue still happens."

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Remove Login Items --Use Safe Mode:

Boot in Safe Mode, and then remove all Login Items, seeing if this no longer occurs. In Safe Mode, Login Items do not run at login, certain preferences are set aside, and damaged system files are then reset. So, once booted in Safe Mode, remove these item, and then boot up normally, attempting another login.

• Booting in Safe Mode: How to Use Safe Mode on your Mac - Apple Support.
• Removing Login Items: Change Users & Groups Login Items Preferences on Mac - Apple Support

SohoSoho Said:

"MacBook Pro shuts down when starting up from battery: [...]Can somebody tell me why this is happening?"

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Troubleshooting MacBook Pro Power:

A. Black Mac Screen:

Go Here: If your Mac doesn't Turn On or Start Up - Apple Support

Using External Devices: Try Resetting the SMC and NVRAM, but this time, using an external keyboard. Connect an external monitor and see if you get an output.

B. Mac Power Issues:

Try a New Charger:

If it is currently charging from a charger, then use a new charger:

• Power & Cables - Mac Accessories - Apple - Select "Mac Compatibility" on the left
• Find the right power adapter and cable for your Mac notebook - Apple Support

A Few Links to Refer to Power:

• If your Mac doesn't Turn On - Apple Support

• How to Turn your Mac On or Off - Apple Support

• About Mac Notebook Batteries - Apple Support

• Charge the MacBook Pro Battery - Apple Support

• If your Mac Battery won't Charge - Apple Support

SohoSoho Said:

"MacBook Pro shuts down when starting up from battery: It dies before I can boot in safe mode."

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Extract the Data - then Format the Drive:

Then, I'd say it is time to upgrade. Erase the hard drive, perhaps extracting data, first. The hard drive would be removed, and then data would be extracted. Take it to an AASP to do so.

Contacting an AASP:

Also, look into taking it to an AASP(Apple Authorized Service Provider) seeing if they offer service for this.

1. Go Here: Find Locations - Apple Authorized Reseller
2. Click: Service & Support
3. Enter: your location information
4. See: if there is an AASP nearby
5. Contact: an AASP that shows up, and find out more about the services that they offer to fix the iPhone