MacBookPro shuts down if power cord removed!!!

Try resetting the System Management Controller…

http://docs.info.apple.com/article.html?artnum=303319

Additionally, try shutting down your MBP, remove the battery, disconnect AC power and leave it sit for 30 seconds or so. Then, reconnect everything, reset the SMC (again if need be) and see it it helps.

I thought I had this problem, but discovered that when I didn't use the computer for a bit before pulling the power cord, it went into power-saving but still on mode (dark screen). Tapping the space bar once brought it back to life in this situation. I hope this helps you out too.

Hey,
I bought my apple also in late november 06.
I have the exact same problem with my battery ( when I unplug it from the power cord it turns off instantly even tough my battery is at 100 % ) and it started a few days ago.
Plz feel free to Ichat me : carlembert is my screen name.
Let me know if you figured anything out.
Thank you

I just did my updates two days ago on my MacBookPro 17" CoreDuo, and since then, mine has been suddenly turning off without warning somewhere between 3 and 20 minutes after unplugging. I am always starting out with a full charge, and sometimes, when I plug in to restart (which is the only way it will restart), it shows 0% left on the battery, and other times, as much as 95% left.

My battery cycle count from System Profiler>Power is 225 cycles, so I am within the 300 cycles where Apple should replace the battery. I have a service appointment at the Genius Bar in two days.

I have repeated these results five times now.

Overnight, I downloaded OS X 10.4.9, since I noticed it became available yesterday. I was hopeful that it may stop this battery problem, so I just unplugged while I was replying to your message. My MacBkPro lasted about a minute off battery before going black.

The restart took longer than usual, but it is up and running. Problem still here.

Same problem here. The problem started fully today but it's been weird for a few days by completly restarting after being put to sleep by closing the lid. Performed the SMC reset with no luck. My Macbook Pro was bought just after the C2D release in mid Nov 06.

Any ideas would be welcome!

Same problem here. Just appeared today out of nowhere. Battery is fully charged. I unplug the power cord and computer shuts down. Did the SMC reset and it didn't help. Installed the 10.4.9 update, no luck. Bought mine in November, will try calling Apple tomorrow and see what they say ...

Me too! exactly the same issue. Core Duo 2, Nov.

Reset PRAM, power manager, 10.4.9 update + combi updater, checked for stuck pins in magsafe. . . no help

Interestingly I swapped the battery with friend at work's identical MBP, my is fine off his battery and his would not work of mine i.e. despite displaying full charge both in OS X and on LEDs, it is dead.

Look forward to solving this one!

I just got my MacBookPro back from service yesterday. I took it in on Saturday, the 17th, to have the display swapped out (under warranty), and they replaced my battery (also under warranty), due to the issues I was experiencing.

I calibrated my replacement battery last night, following the special instructions for Intel portables, and ran it today on line power and on battery power, and it is behaving normally so far. Power levels are descending normally, as opposed to a free fall. It was strange though, and I am curious as to why everyone's batteries started to fail at once, given that they were put into service over a broad period of time last year.

The service people in my local Apple Store are really great.

So i just want to say that my problem has been resolved with a new battery, that apple sent me last week after i had called them a second time telling them that i had no intention traveling in order to have my computer looked at(No appleservice in Linköping, one of swedens 10 biggest cities). The new battery has been working absolutely fine and i even feel that it last a little longer than the old one did when it was new.

Hi

I was having exactly this problem. MacBook Pro, bought Dec 06. Called AppleCare, told them I have done all the checks such as resetting the battery etc.

They sent me a new battery, problem fixed with no recurrences. Looks like a load of dodgy batteries around Nov / Dec last year.

It may not be any help to you but when I looked in the System Profiler and gave the battery details to the AppleCare guy what made them pay attention was the fact the Amperage was showing as negative number even though the battery was showing as fully charged in the menu bar, on the battery and with the coconut battery and istat pro widgets.

Go for a new battery for sure...

So it would seem that the batteries were actually defective, and that the software update issue is probably coincidental.

Wow. At least that is an explanation that makes some sense.

Or perhaps, something in the update just hastened this lurking battery issue?

I am sorry that I did not get to see what my readings were, before they took my battery back. Oh well.

I did not do the newest update but mine also has just started shutting down if I remove the AC.
Amazing that all of a sudden this is happening to us all?
Or perhaps Apple setup has some secret shutdown so that we all get our batteries checked?

This problem has been showing itself on my computer for the last week or so. Noticed that my battery was slightly swollen. Phoned Apple and they're sending me a new one, which I expect will fix the problem.

I have the exakt same problem. please tell me if you find a solution. And also my mac is approximatly the same age bought it as soon as the core2 duos came out (begining of november)