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Macbook pro unexpected shut down

I have a macbook pro (16 months old).  when running off battery and the battery life gets to 34% it shuts down.  Is this a battery problem or a settings problem that I have set wrong?  It makes no difference if I am doing something on the computer or it is just open and running.

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After determining the battery health:
http://support.apple.com/kb/HT1519

Then calibrate the the battery:
http://support.apple.com/kb/HT1490


Posted on Apr 22, 2009

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Looks like the macbook pro battery is on its last legs, you will need to obtain a new battery from apple, if the battery has done less than 150 cycles, (see system profiler) it is possible that apple may replace this free of charge otherwise its at a cost of £97.00 uk. your local apple shop can replace the battery at a reduced rate.

Posted on May 23, 2009

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Check for malicious software

Posted on Apr 14, 2009

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1 Answer

Dell vostro 3500 shuts down only when running on battery


The problem is with copper connector connecting battery. Battery may be loose. Try putting duct tape from battery to laptop chassis. Hope this will fix the problem.

Feb 14, 2013 | Dell Vostro Computers & Internet

1 Answer

MacBook Pro is slow when disconnected with electric charging.


First step would be to Reset Your Mac's SMC
The method for resetting your Mac's SMC depends on the type of Mac you have. All SMC reset instructions require shutting down your Mac first. If your Mac fails to shut down, try pressing and holding the power button until the Mac shuts down, which usually takes 10 seconds or so.

Mac portables with user-removable batteries (MacBook and most MacBook Pros):

1.Shut down your Mac.
2.Disconnect your Mac portable from its MagSafe connector.
3.Remove the battery.
4.Press and hold the power button for at least 5 seconds.
5.Release the power button.
6.Re-install the battery.
7.Reconnect the MagSafe connector.
8.Turn your Mac on.
Mac portables with non-user-removable batteries (MacBook Air and some late 2009 MacBook Pro models):

1.Shut down your Mac.
2.Connect the MagSafe power adapter to your Mac and to a power outlet.
3.On the built-in keyboard (this will not work from an external keyboard), simultaneously press and hold the left shift, control, and option keys while you press the power button. Release all keys at the same time.
4.Press the power button to start your Mac.

Mac desktops (Mac Pro, iMac, Mac mini):

1.Shut down your Mac.
2.Unplug your Mac's power cord.
3.Press and hold the Mac's power button for 15 seconds.
4.Release the power button.
5.Reconnect your Mac's power cord.
6.Wait five seconds.
7.Start your Mac by pressing the power button.

Alternative SMC reset for Mac Pro:

If you have a Mac Pro that isn't responding to the normal SMC reset as described above, you can force a manual SMC reset by using the SMC reset button located on the Mac Pro's motherboard.

1.Shut down your Mac.
2.Unplug the Mac's power cord.
3.Open the Mac Pro's side access panel.
4.Just below the Drive 4 sled and adjacent to the top PCI-e slot is a small button labeled SMC. Press and hold this button for 10 seconds.
5.Close the Mac Pro's side door.
6.Reconnect your Mac's power cord.
7.Wait five seconds.
8.Start your Mac by pressing the power button.
Now that you have reset the SMC on your Mac, it should be back to operating as you expect. If the SMC reset didn't fix your problems, you can try combining it with a PRAM reset. Although the PRAM works differently than the SMC, it can, depending on your Mac model, store a few bits of information that the SMC uses.

Jan 23, 2013 | Computers & Internet

1 Answer

Keyboard Backlit not coming on at all


Set your backlighting in
Apple menu
System Preferences
Keyboard.

otherwise try:
Resetting the SMC on any type of Mac (and any version of OS X) and the type of problems that it may resolve.
When & Why Reset SMC on a Mac? Some Common Hardware Reasons

Typically it's power and hardware related issues that can be helped or resolved by resetting a Mac SMC, particularly if you're having these types of problems:

* Issues with your Mac's cooling fans and fan management: fans run constantly at high speed, fans run high despite low CPU usage and adequate ventilation, fans not working at all, etc

* Power management and battery problems: Mac isn't turning on, sleep isn't working, random shutdowns and reboots, battery isn't charging, Mac won't wake from sleep etc

* Light problems and improper lighting management: battery indicator lights aren't working, display backlighting isn't adjusting to ambient light changes, keyboard backlights not working, etc

* Video and external displays not working: display brightness functionality not working properly, target video mode isn't working properly, external display isn't working, etc

* General performance and functionality problems: abnormally sluggish behavior despite no CPU or disk usage, external ports not working, airport & bluetooth aren't showing up, external devices are not being found, etc

So now that you've concluded you need to reset your SMC (Note that the SMC is on Intel Mac's only), here's how to do it on MacBook's, MacBook Pro's, iMac's, Mac Mini's, and Mac Pro's. Notice that the reset instructions are different for MacBook and MacBook Pro's if you have an internal or detachable battery.
Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro's with an internal non-removable battery

This is how to reset SMC on most modern Mac laptops:

Shutdown your MacBook Air / MacBook Pro
Connect the power adapter to your Mac
On the MacBook/Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time
Release all keys and the power button at the same time
Boot your Mac as usual

Here's the key sequence to hold down:

Reset the SMC of a MacBook Air or Retina MacBook Pro

Do keep in mind that by resetting the SMC you will lose power specific settings, like the time it takes to sleep a Mac and other customizations to power settings. No big deal, but if you have made many changes to your hardware behavior you will want to adjust stuff like sleep behavior again.
Reset SMC of an iMac, Mac Pro, Mac Mini

Resetting SMC is different for non-portable Macs:

Shut down your Mac
Disconnect the power cord
Press and hold the Mac's power button for 5 seconds
Release the button
Reattach the power cables and boot the Mac as usual

Reset the SMC of a MacBook or MacBook Pro's with detachable batteries

mac reset the smc Older MacBook laptops with a removable battery can reset SMC with the following approach:

Shutdown the MacBook/Pro and remove the battery
Disconnect the power adapter, hold the Power Key for 10 seconds
Release the power key and reconnect your battery and power adapter
Turn your Mac on
Let boot as usual

Hopefully that will clear up your problems, if not it might be worth a visit to the Apple Store or a certified repair center.

Happy New Year,
Kerry

Jul 08, 2012 | Apple MacBook Air

1 Answer

Asus u52 shut down unexpectedly


When the CPU overheats then it will shut down (i.e. thermaloverload) and won't boot up again until it has cooled down. If this is theproblem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust.
Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged with dust the remove the dust and make surethe vents are clear and dust free. Use a small brush and can of compressed airto do this.

Jun 17, 2012 | ASUS U52F-BBL9 Laptop

1 Answer

Any tips on extending the life of a Macbook Pro battery?


My suggestion would be to buy a new battery.

After that you should shut down your computer at night (or every other night) and make sure you don't leave it plugged in for a long time (only charge until it is 100% then unplug).

These are two of the most important things towards ensuring significant battery life.

Hope that helps!

Dec 13, 2011 | Apple MacBook Pro Laptop Computer with...

1 Answer

My Macbook Pro battery life not very good - I have only had it for 5 months


You need to change your energy save preferences...if this doesnt improve battery life it could be defective battery.

May 18, 2011 | Apple MacBook Pro Laptop Computer with...

1 Answer

Msnbc Video, Farmville, etc... loads half way then freezes my macbook pro. I'm then forced to manually shut down. I updated adobe. At a loss.....


my2pugs, you should install ubuntu linux on your macbook pro it is more user friendly, it will run on a mac computer getting rid of those problems

Dec 27, 2009 | Apple MacBook Pro Notebook

1 Answer

Unexpected shutdown with fresh battery ...only cycled 23 times so far. Mac shuts down after about 3 minutes....then shuts down on boot sequence after that. No warning...just shuts down instantly. Macbook...


"Shuts down instantly without warning" is the hallmark of a faulty battery. "All five lights on" is meaningless, as batteries with this fault go from 100% to 0% in a finger-snap. Assuming your battery is under warranty, it should be replaced at no charge.

Nov 08, 2009 | Apple MacBook Pro Notebook

1 Answer

Unexpected shutdown with new battery ...only


This is a duplicate submission -- I will be answering the other copy. Thanks.

Nov 08, 2009 | Apple MacBook Pro Notebook

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