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Model A1297 Unibody: Early 2009, Mid 2009, Mid 2010, Early 2011 & Late 2011

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battery shuts down on start up

on startup thru the bar gain at 3/4 the mac shuts down did a PRAM reset three chimes still having the issue battery works if start up is n cable and then removed too battery but will not start on just battery power

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Batterie per PC portatili

Una soluzione semplice per un grande aumento di potenza.

Acquista ora

Batterie per PC portatili

Una soluzione semplice per un grande aumento di potenza.

Acquista ora

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With this little info you supply you’re looking for a wiz more than a tech, however if it’s a 2011 i7 quadcore it’s probably another dead GPU.

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I’m assuming it’s a Macbook of some kind since you mention it’s got a battery… year and model would be helpful. Other than that, I think you said your MacBook has a couple of problems:

  1. Makes 3 beeping sounds when you start it
  2. Does not fully start up and shuts down when the progress bar is around 75%, even after a PRAM reset
  3. Only starts with power adapter plugged in, but will run on battery alone after it has started

For #1 - either bad or loose RAM. Try reseating or replacing it. I would unplug the battery before doing this.

For #2 - could be a bad drive or OSX errors - what version are you running? If you have a newer version, get into recovery mode (hold Command + R keys after starting) and try Disk Utility to fix any errors. For older OSX, you’ll need a bootable OSX on CD or USB.

For #3 - you might have a bad battery - common if it’s more than 5 years old.

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Commenti:

How about reading the question before throwing random answers ?

da

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RANDALL NICHOLAS sarà eternamente grato.
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