Powerbook G4 randomly shuts down even with full battery power

I have a three and a bit year old powerbook g4 (my apple care ran out in November) that has recently - as in the last two days - started randomly powering down without warning or error messages, regardless of how much battery power I may or may not have.
A bit of history - not sure what is and isn't pertinent.
I only recently - about six months to a year ago - switched out my recalled battery for a replacement one.
I also received a new power cord under warranty within the last year - but have had no problems before.
Before my powerbook came out of warranty, I took it into my local genius bar to have tests run to see if anything was wrong that I was not aware of, hoping to be able to get it fixed while still in warranty - it came back to me with no repairs and a clean bill of health.
I was on vacation for two weeks, and while on vacation my powerbook sat - powered down - in it's bag untouched the whole time. The problems started (or at least I first noticed them) within a few days after returning.
The other day, before any of this started, I noticed that even though the power adapter was in and glowing, the battery charging icon said "not charging".
The second time the random power-off happened, I did notice that the battery icon had an "x" in it, before it shut down.
The shutdowns are not like proper shutdown processes... one minute the computer is on, the next it's not. It's like the computer thinks there's no power, regardless of the actual charge of the battery.
I use my laptop on a laptop tray to maintain airflow underneath it and reduce overheating, but even so, the laptop seems to get very hot (although this is one of the issues I was worried about when I took it in to the genius bar before the warranty ran out, and they said it didn't get any more hot than they were supposed to), and also the power connector gets very hot. I don't know if overheating might have something to do with it?
So far I haven't noticed if it has happened while I've had the AC adapter plugged in... I think it only happens if it's running on battery, but not completely sure of this.
After the computer shuts down, I can restart it immediately (though these days it is taking longer) and I do not receive any error messages.
I usually turn off my computer when I won't be using it for a while - like before I go to bed or to work.
I recently upgraded my OS from panther to leopard, but was assured that it was compatible. I've had Leopard installed for at least three months, and the problems have only just started, so it probably doesn't have anything to do with that.
Well, that's about every possible piece of information I can think of that might be at all relevant to the situation. Does anyone have any ideas about what's happening? I have a feeling the news is going to be bad and I'll probably have to get a new computer...
Message was edited by: rraaarr

Here's the Apple article on how to reset the PMU:
http://docs.info.apple.com/article.html?artnum=14449
Possibly this might fix the problem. If not, here's a link to the MBP battery program:
http://www.apple.com/support/macbook_macbookpro/batteryupdate/
This program does NOT apply to your battery, but I think you may recognize some of the symptoms that yours is exhibiting. It also sounds like your power adapter may be getting warmer than it should, but that could have to do with the battery being defective. But if less than a year old, the power adapter should also be under its own warranty period.
If you have access to an Apple Store, you could make an appointment with the genius bar. They should be able to evaluate both the battery and the power adaptor by swapping yours out with ones that are known to be good. If not, call Apple.
Good luck!

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Here's the Apple article on how to reset the PMU:
http://docs.info.apple.com/article.html?artnum=14449
Possibly this might fix the problem. If not, here's a link to the MBP battery program:
http://www.apple.com/support/macbook_macbookpro/batteryupdate/
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Blackberry curve 9360 shuts down even when full battery

Can anyone help me pls? My bb curve 9360 phone shuts down even when almost full battery. Then when i try to reboot by taking in and out the battery, it shuts down again many times. i changed my sim card recently cos the old one spoilt. the battery drains very fast. i deleted many apps. i reduce backlighting to min. i reduce time for the screen to off. i off location services. i increased the interval for updates for my apps till very long. i noticed when it is connecting to 3G network it shuts down. and keeps shutting down upon reboot. battery runs out very fast. but can also shutdown on full battery. it also auto shuts down when i am using apps or connected to internet. Can pls help to resolve? Thanks. appreciate.
Solved!
Go to Solution.

try
The on-device battery meter is 'off sync' with the actual battery charge. There are a couple of ways you can try to repair this...
Leave the device to charge an hours or so, and then, still connected to the charging cable, remove the the battery from the device a few seconds and reinsert it. Watch over the next couple of days to see if the charge and the battery use is in sync.
Roughly every 30 charges, deliberately discharge your battery to 10-15%, and fully charge to 100% afterwards. This will help maintain the accuracy of the “fuel gauge” on the device (your battery meter or scale).
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VIA | JSanders
http://supportforums.blackberry.com/t5/BlackBerry-Curve/Blackberry-Curve-9300-Automatic-shut-down-Pl...
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PowerBook shuts down even with new battery

My mom has a 12" PowerBook that she recently purchased a new battery for. Even with this new battery, the laptop shuts down seemingly randomly before the battery gets even down to 20%. They sent a new battery, and the laptop still does it.
Any ideas?

Sounds like the power manager needs replacing. See these sources which may be able to fix it for less than Apple:
http://www.dttservice.com/
http://www.powerbookresq.com/
http://www.microdocusa.com/
http://www.macspecialist.com/
http://www.techrestore.com/
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http://www.ifixit.com/

RMBP randomly shuts down - now with red battery indicator at 52%

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More information that might be helpful:
OS 10.8.5
2.6 ghz intel i7
16 GB 1600 MHz DDR3
250 GB SSD (with ~25GB free)
NVIDIA GeForce GT 650M 1024 MB
I have had a Speck hard shell case covering the laptop for a few weeks, but no issues until this week.
I am a pro photographer who shoots tethered on location and carries my rMBP around on assignment. It has never been dropped, or damaged in any way. I baby this thing!
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Model Information:
Serial Number:
Manufacturer:
Device Name:
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 511
Hardware Revision: 000a
Cell Revision: 1150
Charge Information:
Charge Remaining (mAh): 3455
Fully Charged: No
Charging: No
Full Charge Capacity (mAh): 7431
Health Information:
Cycle Count: 533
Condition: Normal
Battery Installed: Yes
Amperage (mA): -2533
Voltage (mV): 10719
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Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 10
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Wake on Clamshell Open: Yes
Wake on LAN: No
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AutoPowerOff Enabled: 1
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Display Sleep Uses Dim: Yes
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PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 1
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Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 5
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Wake on Clamshell Open: Yes
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AutoPowerOff Enabled: 1
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Display Sleep Uses Dim: Yes
GPUSwitch: 2
Reduce Brightness: Yes
Standby Delay: 4200
Standby Enabled: 1
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AC Charger Information:
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Powerbook 12 Random shut down issue

Hello, I have a 12" PB with 1Ghz G4 and 752 RAM installed, and OSX 10.4.8. Lately I have been experiencing serious problem with random shut down. Also the battery is not holding its charge properly. Here are the summary of the problems, I am wondering if others also have this issue.
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Hello
I have a MacBook pro late 2008 model, recently it started to randomly shut down.
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Hi, I hope somebody can help me... Long story here...
I bought my 9300 in Istanbul, where I live. I have a Vodafone Turkey simcard and Vodafone Spain simcard. I swithch simcards when I travel, works beautifully, even with email and whatsapp.
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Mucolly wrote:
Help guyz my phone turns off itself with a full battery of which I deceded to buy new original battery but problem persist and when I charge its working when I unplug my phone goes white on the screen which is switching itself off help guyz.
Hi and Welcome to the Community!
There are many things already posted in this thread...have you yet read and attempted any of them?
You also may want to attempt to boot into Safe Mode:
KB17877 How to start a BlackBerry smartphone in Safe Mode
It may take you multiple attempts to get the ESC key sequence (press/release/hold) correct, so be patient. When successfully into Safe Mode, see what happens.
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But, if the behavior continues, you may need to consider more drastic actions -- e.g., WIPE, OS Reload, BBSAK Wipe/Reload, "bare bones" OS loading, etc.
Do also keep in mind that, if the problem is at a hardware level, then no amount of self-diagnosis nor internet-distance recommendations will be of any use...only in-hand evaluation by a qualified hardware technician can properly diagnose a hardware problem.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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HT4137 got an iphone 4s for christmas. everyday it shuts down even when the battery is charged and locks up. won't come on nor will it charge. anybody know what the problem might be?

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Have you reset the SMC?

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This is making my crazy, crazy.
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Hi Bluey
Thank you for your post and offering your help to the users having the same problem. It makes sense, worth to have a try.

MacBook shuts down spontaneously when on battery power

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