Macbook shuts off instantly when I unplug power cord.

Hello everybody.
This afternoon while I was watching a movie on my macbook, (it was on battery power, about 3/4 full) it just shut off. I could not turn it back on, so i plugged the power cord back in, it turned on fine, but whenever I unplug it it shuts down, even though it recognises the battery and charge level and all.
The thing is, when it shuts down it's not like if there was no battery, the screen dims, the battery icon changes to the one it has when its on battery power, and about 1-2 seconds later everything just shuts down. I'm just out of warranty (about 2 weeks ago). Do you guys think this is a hardware issue? I've gone through all the updates i have found on batteries and even reset the power management thing (where you turn the computer off with no battery and hold the power button).
Thanks for any help
-Cedric

I have exactly the same problem, and it only started yesterday after a year of using my MacBook Pro with no problems. My system profile is as below:
Battery Power:
System Sleep Timer (Minutes): 45
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 45
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: No
Battery Information:
Model Information:
Serial Number: Sony-ASMB012-36ed-758f
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0003
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0500
Cell Revision: 0303
Charge Information:
Charge remaining (mAh): 3855
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 3905
Health Information:
Cycle count: 324
Battery health: Good
Battery Installed: Yes
Amperage (mA): -1
Voltage (mV): 12487
If anybody can please help me it would be much appreciated. Thanks in advance.

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How old is your macbook, and what condition is your battery in?
I doubt you're being hacked - more like your battery is dead.
Try doing both PRAM and SMC resets, setting the system time and seeing if they hold. Ensure you are connected to a power source.
For PRAM
http://support.apple.com/kb/HT1379?viewlocale=en_US&locale=en_US
For SMC
http://support.apple.com/kb/HT3964

MBP dies when I unplug power cord

Anyone have any ideas? The battery wasn't in the best shape, it had "check battery" for about a year now.
Of course, Apple refused to do anything for me, as it's out of warranty. Until last week I was getting maybe an hour out of it. But ever since upgrading to 10.5.7 last week, as soon as I disconnect the power-cord, 1 sec later, the laptop just dies, requiring a reboot.
Tried resetting PRAM and the PMU/SMC. Reinstalled 10.5.7.
Here's the bat info:
Model Information:
Serial Number: Sony-ASMB012-364d-7644
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0003
PCB Lot Code: 0000
Firmware Version: 102a
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Fully charged: Yes
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Voltage (mV): 12347

"The battery wasn't in the best shape, _it had "check battery" for about a year now. "_
Why did you wait so long for help?
Try the following:
HD/System/Library/SystemConfiguration & look for a file called batteryupdater.bundle. Select Get Info for the file.
If its version number is 1.2 or 1.3 you should be fine If not, or if you cannot locate a batteryupdater.bundle file (by using Spotlight, searching manually or using a 3rd party search feature) then download an update from Apple's website & install it. *If installing has no effect, you probably need a new battery.*
Your battery may be replaced for free. Take your computer to an Apple Store. _The staff will be able to check to determine if your model MBP qualifies for the free battery program._
MacBook and MacBook Pro Battery Update 1.2 Or you can take your case up w/Apple Customer Relations - 1-800-767-2775.
Good luck!

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My 2.0GHz MacBook has started shutting down spontaneously after half an hour or so of waking from sleep. After it shuts down, when I try to reboot it it shuts down straight away after the boot sound.
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b) trust Apple to fix all the issues I have with the machine.
I want a complete replacement, that's the only way I have a guarantee this problem won't come back in the middle of an interview recording.
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ronicr76,
First it would be helpful if you post the exact model, year and OS version you have.
> The LED light is on but only when the laptop is closed<
So that light is the sleep indicator and tells us that the laptop is going to sleep when you close the lid. That would be normal behavior so the machine is still working. Possibly you're experiencing a backlight failure. With the machine supposedly "on" use a flashlight to carefully examine the screen. Do you see the desktop? Yes? machine is still running and something is wrong with the backlight.
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How to use and troubleshoot FireWire target disk mode
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My macbook shuts off and I kept a journal for it because mine's got complications.
July 1, 2014 (Tuesday)
I spilled a cup of choclate milk on my keyboard, it was soaked! But my battery was drained so I know nothing had short out. So I turned it over and never tried to turn it on.
July 2
I went to the nearest apple center and asked them to clean it for me. (I knew it wasn't a good idea to clean it myself) They put it in a plastic bag but I asked them to open it as soon as possible so I know what parts are affected. They told me they'd take a picture of the inside for me and go back after an hour. Milk was still inside everywhere so I asked them to take it in.
July 8
I called to get an update on my mac and they said it wasn't economically practical to repair it because they recommended a full system replacement. I got depressed and accepted my Mac's fate. But what's annoying is I put my mac in on July 2 and they only tried to clean it in July 5 which makes me think that was the reason my mac was irreparable.
July 9
I took my mac and tried to find another opinion but I showed the diagnostics from the apple store and they said they couldn't fix it. My parents were getting ready to buy a new one.
July 13
I realized that my mac didn't have charge when milk spilled on it so I tried to charge it and BOOM IT OPENED. They keyboards were sticky and it takes a moment before my computer reacts to the trackpad but it works! Even all the keys works! But it doesn't charge.
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(in the interval my mac works perfectly, it stays for normal 7 hours when battery is charged fully)
However at July 19
There was no electricity for four days (A typhoon came in the Philippines) and my battery is about 7% so I went to the public market to get it charge while I wait for electricity. I charged it for about 3 hours and sideways because it was inside my backpack while it charged so noone will notice it. When I got home and opened my laptop, it shut off randomly after my desktop appeared after start up. So I was sad.
July 20
I found a solution online to use the option-shift-power button my mac opened and worked normally!
July 21
My computer was normal in the morning then in the afternoon it shut off again after I waked it up from sleep. Tried option-shift for about 3-5 times before it worked with varying intervals from 5-20 minutes each
July 22
I get nervous when I use it but it worked perfectly I was even able to edit with Final-cut pro and HD clips.
Wednesday
Worked perfectly in the morning but in the afternoon, after waking it up from sleep it won't turn on tried the option-shift then I tried resetting the SMC for about three times (my mac is a unibody) but it didn't turn on the whole evening.
Today Thursday morning July 24
I tried to reset SMC first thing in the morning after the thing won't turn on. After about an hour, I tried to turn my mac on normally and it opened. So what I did is to back up all my files. (It took the whole afternoon) and at night I ran diagnostics (D during start up) and no threats were found
Haven't been experiencing the trouble, as of the moment I'm writing this Jul 25, Friday (12:13 AM) HK time Philippines.
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Macbook Pro 13-inch, Mid 2012
Bought in December 2012
Processor 2.5 GHz Intel Core i5
Memory 4 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000
Software OS X 10.9.4 (13E28)

tryshdanielle wrote:
So what I'm asking here is what do I do to make sure this doesn't occur anymore.
Get a new computer. Consider switching to regular milk, or even a light fruit juice.

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I've been using the power adapter pretty much all the time with my MBP but now that I've been using it on battery power it has automatically shut off at around 85% battery power. I haven't always had the battery in while using the charger but for the last year I have. I'm not sure if that has any relevance.

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