Macbook randomly shuts down.

Hello~ Alex
I have the same situation just like yours recently. It happened last 3 times in last 2 weeks, both on off charge. There have anyone can help us? Thanks a lot.

Hello Alex and Leo,

I seen both of your posts and wanted to recommmend a couple of troubleshooting steps that the applecare techs may have you do, like resetting the "System Managment Controller" (SMC) and verifying/repairing your disk permissions and hard disk through the disk utility.I posted a link at the end of this reply that might help the problems your having with your systems. Before trying these steps you need to verify if your able to remove the batteries from your macbooks or not because the steps are different for laptops in which the battery can be removed and cannot be removed.

http://support.apple.com/kb/HT3964

Please let me know if this does help or not, if it doesn't i will be happy to post the other link for the next step if needed.

Trizzy TreyRogers

AppleCare Advisor Tier I

I have also experienced this problem lately. Just shuts down no warning anymore. I usually have to 40% battery life left but need to start with adapter SMC reset did not help or only shortly problem returns (only 490 cycles)

iMV,

i did read your post and would advise to run a software update so you can get the latest soft release 10.5.8 id u havent already. If problems persist try taking it to an apple store, you get 15 minutes of free support

Hey Alex

No problem just trying to help and no thats not a stupid question, i understnad where your coming from completely. Resetting your SMC can actually enhance the performance of your system, it does not wipe the hard drive in any way at all, it simply resets the low level functions and is a basic step for resolving unexpected shutdowns.

sorry i did not update my info, but running snow L 10.6.4

Go to the Apple menu, About this Mac > More Info... then choose "Power" and copy-and-paste the information displayed. It sounds like your battery may be the issue.

I am having spontaneous shut-downs, too, but it seems to occur only when I am watching a video in Miro and then only after about three minutes of viewing.

In case it helps, here is what I get from the "Power" entry on "About this Mac:"


System Power Settings:

AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes

Battery Information:

Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4745
Remaining Capacity (mAh): 2920
Amperage (mA): 1538
Voltage (mV): 11987
Cycle Count: 1809

AC Charger Information:

Connected: Yes
Charging: Yes

Hardware Configuration:

UPS Installed: No

I also have had my mac shut down on me at random. Just starting yesterday. Both during battery powered operation. first time i had just unplugged it for about 15mins. The second time it was half way trough a movie. I already tried the SMC reset. If it is at all helpful here is my Power info


Charge Information:
Charge remaining (mAh): 1247
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 2936
Health Information:
Cycle count: 347
Condition: Fair
Battery Installed: Yes
Amperage (mA): 1151
Voltage (mV): 12277

Full charge capacity (mAh): 2936
Cycle count: 347
Condition: Fair

Low capacity, high cycle count, and merely "Fair" for condition--you need a new battery for full functionality.

only 3 cycles and it drops 800 mAh?!?!?!


Full charge capacity (mAh): 2136
Health Information:
Cycle count: 350
Condition: Fair

While 1) it is true that reported battery capacities can fluctuate from day to day and even hour to hour, 2) it is still true that your specific battery is failing and needs to be replaced.