Failure to boot on battery power

My MacBook Pro (5,5) is failing to boot unless connected with the AC cable (mag-safe) turned on.
from battery power (with fully charged battery) the machine beeps in the following sequence:
3 fast beeps
3 slow beeps
3 fast beeps
(that's NINE beeps in total)
the screen stays black the entire time.
the light on the front of the laptop is turned on, but the screen never activates.
if I hold down the power button for a few seconds the LED indicator (sleep light?)
turns off. then I can connect the mag safe and boot successfully.
I have run the hardware diagnostic delivered on the installation CD and this
discovers ZERO problems.
does anybody have experience with this error or know what is wrong?
thanks in advance!
|K<

@capt fred: those EFI restore images are extremely poorly documented and horribly indexed, aren't they? 8(
not a single one mentions a macbookpro5,5 ...
anyway, I think I have figured out what has happened, now all I have to do is figure out how to remedy it...
(( achtung: this would seem to be the user-story-from-**** ))
the macbookpro5,5 ( 13" ) was shut down and NOT connected to AC power.
a very distracted (and somewhat in a hurry) user (ie ME) picked up the laptop and
pushed the power button-- WHILE in that very instant being distracted by his daughter
wanting to know some piece of very important information (for a 10-year-old). ALL THE WHILE
the distracted user (ME) kept holding down the power button while explaining to the
10-year-old-girl why the mice run away when you turn on the lights (which took some minutes).
Still holding the power button down the distracted user (ME) noticed that the macbookpro had
begun to emit a series of beeps. It was at this point that the distracted user (ME) released
the power button and himself emitted a series of vocalizations that his 10-year-old-daughter is not
supposed to ever hear (EVAR). from this point forward the macbookpro will NO LONGER BOOT
FROM BATTERY POWER, instead opting to only emit a series of beeps (3 short, 3 long, 3 short).
now... I understand that I have unwittingly (and un-willingly) informed my macbookpro that she is
to expect a firmware update via cd-rom. however: she does not accept any firmware update CD's
AND she will not boot if not connected to AC power. so how do I get out of this catch-22 ?
please, apple gurus! please please please make my expensive little toy work properly again!!
thanks in advance,
|K<

Similar Messages

IBook sometimes boots on battery power

I recently inherited an 800MHz iBook G3 that has been acting strangely. Its internal hard drive was shot (it made loud clicking noises) but I got it to boot off an external firewire HD. The machine works great when plugged in to AC power, but acts very strangely when on battery power. It wouldn't boot on battery power, but if the iBook was running I could unplug the adapter and sometimes the iBook would run for a while and then shut off and other times it would immediately shut off (the battery was 100% charged).
I replaced the internal HD, hoping somehow it would solve my problem, but it didn't. I have done some more experimenting and it seems if I have had the iBook plugged in to AC power for a while (like overnight), the ibook will boot on battery power and run anywhere from 10 seconds to a minute before powering completely down. After that, the machine is completely dead and I have to plug it in to AC power to get it to boot again. Also, when it reboots, the time is messed up. I get an error message that says "Your computer's clock is set to a date before March 24th 2001. This may cause some applications to behave erratically. Please use the ..."
I have reset the PRAM and PMU repeatedly, I have tried other batteries (and while none of them were new they worked in other ibooks) with the same result. I also tried my battery in another ibook and it booted and ran that ibook just fine. Something in my ibook just shuts it down. I get some sort of system halt call in the log file.
I'm at a loss... anybody have any ideas as to what could be wrong or what I can do to fix it? Thanks for the help.

Hey JW.
Well like SU says:
"It sounds like there is a bad connection between the battery and the computer. "
So what I have seen on these is a bent locking tab on the battery lock. I had a few in here like that. I could lift the iBook 1" when it was running on battery and if I dropped that small bit it would shut down. Bending the locking tab back solved the problem. Careful it's fragile.
Also like Rhonda says it could be a logic board problem.
I've seen the super capacitors on the G3s go bad. Typically it's a .22 Farads @ 5.5 VDC. What happens is that the cap blows up (probably due to over filling like in the classic cases of cap failure in the past). It's easy to see since the outer case gets peeled back.
If you're date and time is constantly messed up I'd suspect that. I've replaced those caps with ones I bought from Electronics Goldmine.
Since that cap holds settings on the PMU it would also affect power if there were small transients that could cause you problems. The super cap system is designed to hold settings for around 30 seconds while you change batteries but if that cap is dead it wouldn't hold settings for a millisecond.
Richard

Head scratcher--new HD, macbook won't boot on battery power

I needed a larger hard drive because the orig 60gb was getting full. replaced with a seagate 250gb. now, macbook will no longer boot on battery power. works fine if plugged in. if unplugged while running, macbook goes dead. battery is fully charged.
a puzzlement. any ideas, brain trust?
...joe

What is the model number of the HDD you bought?
Next, make sure you have the battery in all the way and that the HDD is securely installed. Then try a PRAM and SMC reset by shutting down, unplugging the magsafe, taking out the battery, and holding down the power button for at least five seconds. Next, put everything back and hold down commmand-option-p-r at startup until it chimes twice then let go.
If none of that works put in the old HDD and see what happens.

Satellite L875D-S7232 Hangs Up When Booting on Battery Power

Hello all... As I stated in another thread regarding Special Function Keys, my new Satellite L875D-S7232 has an issue that during boot-up of Windows 7 HP SP1 without the AC Adapter plugged into it, it will "hang up". After many hours of troubleshooting & even having it looked at from the retail tech that sold it to me, we have found no solution for this. I have also formatted the machine, partitioned the HD, & installed My version of Windows 7 Ultimate 64-Bit SP1, along with updated ATI & Realtek drivers, along with only the updated driver software from Toshiba support website, & this issue still presists. This apparently isn't due to faulty written bloatware, & apparently due to an actual hardware issue. I am returning it to the retail outlet I purchased it from, in hopes they have a replacement machine of this model since I do like this platform at the price I got it. I will respond to this post to let ya know if the replacement was a success & the issue only pretained to this actual machine, which is what I am suspecting since I haven't seen any posts on this forum of a similiar issue. I did come across a port/thread (whatever ya call them) where a person had a different model, & his machine did exactly the reverse of mine, where his machine would hang up on the boot if the AC adapter was plugged in, but fine when running on battery. Myself & the retail tech even tried the solution they suggested of changing BIOS setting on the Processor cores... This solution was unsuccesful for my machine.

I hope it works fine after the exchange. Let us know how it goes.
- Peter

T410s won't boot on battery power

This is a relatively new problem (i.e. it didn't happen when I first got the laptop). If the computer is fully off, and I unplug it, I press the power button and nothing happens. When I plug it in, I can turn it on no problem. Sleep mode on/off is unaffected by this.
I sent it in for an RMA a while back and they said the battery didn't pass tests. They sent me a new one but I'm still having problems. Any ideas? Is it a setting somewhere I'm missing?

hey kayson,
i would recommend that you get in contact with tech support via the link below
http://www.lenovo.com/contact/us/en/
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IMac not booting up after power failure

work around for at home/personal users which should work, the OS try's to retrieve user authentication Info from the previous logged on user so disconnecting the network cable or disabling or turning off the WiFi/ wireless should do the trick, just make sure the power is fully drained or have the power cable or battery disconnected for 25-30seconds to ensure the power is drained from the system. For all those Domain Admins/Users enable do not write on the users directory so the OS doesn't recognize a user account to try and retrieve info, if you perform this the OS will just create a temp user profile folder and delete it when theirs a power failure and not try to look for it after the power failure when booting up not causing to give you the gray boot up splash screen and go right into OS X, hope this helps and good luck!

work around for at home/personal users which should work, the OS try's to retrieve user authentication Info from the previous logged on user so disconnecting the network cable or disabling or turning off the WiFi/ wireless should do the trick, just make sure the power is fully drained or have the power cable or battery disconnected for 25-30seconds to ensure the power is drained from the system. For all those Domain Admins/Users enable do not write on the users directory so the OS doesn't recognize a user account to try and retrieve info, if you perform this the OS will just create a temp user profile folder and delete it when theirs a power failure and not try to look for it after the power failure when booting up not causing to give you the gray boot up splash screen and go right into OS X, hope this helps and good luck!

Satellite A500-17X blank screen on boot up using battery power

When I boot up A500-17x in battery power, it is getting booted up in the background, but my screen is blank.
After that if I connect it to AC power and switch off/on the laptop power button, the display comes back to life.
There is no problem when I boot up when connected to AC power.
Any suggestions?

Hi
Very strange issue
Did you notice this issue from beginning?
First of all check if your BIOS is up to date. Update the BIOS if newer version is available.
Furthermore it would be recommended to update the display driver.
But if both updates dont change this, then I would recommend contacting an ASP in your country. It could be a hardware issue.

Satellite A85-s107 - blank screen on boot up using battery power

Satellite A85-s107 blank screen on boot up using battery power
When I boot up A85-s107 in battery power, it is getting booted up in the background, but my screen is blank.
After that if I connect it to AC power and switch off/on the laptop power button, the display comes back to life.
There is no problem when I boot up when connected to AC power.
Battery is fully charged and computer will run off battery if I remove AC after boootup
Any suggestions?
Ps:
also notice that when I remove AC and then reconnect I have to start the computer twice as it doesnt boot the 1st time?

hi nick34_99,
sounds to me like a bad charging electronic...
i got this issue on my sat3000 too, but only when battery is not fully charged...
start the unit with a dos-disc (freedos has an cd image) and let the battery run "dry"...
after that boot without battery (ac-adapter connected of course) and log on.
after that shut down insert battery and try with batt only....
this trick has done magic on my machine...

Boot times - Plugged in vs. battery Power

It's not a problem, I simply want to understand why there is a definitely noticeable different in boot times between being connected to a power supply vs. being under battery power.
There is a significant difference. I clocked from power button to login screen, 16 seconds with being plugged in, to over 45 seconds on battery. I tested it numerous times, under different conditions, cold boot, reboot, etc. It seems to make little to no difference.
This isn't a huge deal for me, I can just let my MBP sleep when going from class to class or home to class, etc.
I simply wanted to understand the huge difference and why.
Thanks,
Mario
Macbook Pro Mac OS X (10.4.10) MBP 2.2, 2gig, 128 nvidia, 120gig, superdrive, glossy

Yeah, it was just something I was wondering about.
Thanks for the reply, it is the obvious answer. I know the core clocks down, but I couldn't attribute that kind of difference in boot times to just a slower clock imho.
~m

MBP (13-inch, early 2011) goes into hibernation instead of safe sleep upon closing the lid (only when using battery power)

MBP details
13-inch MacBook Pro, early 2011 (model identifier: MacBookPro8,1)
Running Yosemite, OS X 10.10.1 (however, problem started while using Mavericks)
2.5 GHz Intel Core i5
4 GB memory
Symptoms
* the MBP goes into hibernation instead of sleep upon closing the lid on battery power (i.e., when AC adapter is NOT connected)
-- problem does not occur when AC adapter is connected
* putting the computer to sleep by other means does not induce the problem; these other means include:
-- [i] option+command+Power,
-- [ii] Apple Icon --> Sleep,
-- [iii] in Terminal: pmset sleepnow
* the battery is NOT getting drained at all; if I close the lid on 87%, the battery is still at about 87% when I get the MBP back up and running
To be as clear as possible:
(1) MBP is on and in use (power source: battery); battery is at X%
(2) the lid is then closed
(3) the battery indicator light glows bright for about 10 seconds, then shuts off, and with it so does the MBP (all fans and sounds cease)
(4) opening the lid and pressing any key on the keyboard does nothing (the computer is not sleeping)
(5) to turn the MBP back on, I must hit the power button once; this brings up and the gray screen and loading bar indicative of returning from hibernation
(6) log in; battery is still at X%
Attempted Solutions / Fixes
There are Apple Discussions addressing similar MBP issues, many of which at least have work-arounds, if not full-blown solutions. However, I have tried many of the proposed work-arounds and solutions; nothing has solved my problem. Such attempted solutions include:
* made sure EFI/SMC firmware was up to date
* updated all software
* logged in as a different user
* booted in Safe Mode
* reset the PRAM
* repaired disk permissions using Disk Utility
* repaired additional disk permissions in recovery mode (a la this chron.com advice)
* ran the Apple Hardware Test multiple times (short test while plugged in, short test on battery, extended test while plugged in, extended test on battery)
* booted from an external known-good OS on USB drive
* reseated the RAM
* used MemTest to test the RAM's health (it was good)
* tested my battery's health with the app Battery Health (it is healthy!)
* booted my computer with one stick of the MBP's original RAM at a time (figured "why not?")
* booted my computer using other sticks of RAM
* checked my power management settings using PMSET in the terminal (e.g., pmset -g); tried various hibernation modes (e.g., sudo pmset -a hibernationmode X, where X=0,1,3, etc)
* searched/grepped through my power management logs and Console messages to look for googleable items (e.g., pmset -g log | grep WORD, where WORD=failure, sleep, etc); still have not found help online
* brought the MBP to a Mac Genius
-- he ran some further tests, but found nothing;
-- he re-installed my OS as a hopeful-hail-mary-just-maybe-last-ditch effort; the problem persisted!
-- we both agreed that we had ruled out a software cause
-- he offered me to leave my MBP to get fixed for a flat fee of $300.00 (which after a couple weeks of trying to figure this out is starting to sound more and more reasonable)
Given that it is likely not a software issue, what hardware might it be? By booting from an OS on an external drive, I think I've ruled out a bad hard drive or hard drive cable. Also, given that inducing sleep in any way other than closing the MBP's lid does not cause the problem, it seems there might be a wire (or something) in the hinge section of the MBP that gets moved when the lid is closed possibly causing some kind of short circuit...or something.
If someone with more experience interpreting Console messages, for example, can help, I'd be happy to provide some logs, or any additional information.
Thank you for your time and consideration.

Ok, this is a crazy-simple, quasi-embarrassing fix, but I'll post it anyway just in case anyone is having a similar problem (for example, this guy: Changes to pmset being ignored).
Some time around late last August / early September (2014) this issue began happening for me (specifically, issue = closing lid while on battery power induces hibernation / shut down instead of sleep --- independent of hibernation mode). Maybe it was when I upgraded to Yosemite (not sure what the exact date of that was). As detailed in my original post, I frantically tried everything I could think of... At that time, however, I had quite a few presentations and posters to create and present at meetings and conferences, so I held off fixing it for a couple of months and returned to it this past week, where I tried a few more things listed above, but again to no avail...
This morning, I simply tried fudging around with all my power management settings again (via pmset in Terminal). The simplicity of the fix surprised me. But now that I understand it, I know it is likely the same fix for other threads I've read, such as the one above:
(TLDR in bold)
(1) Take note of your power management settings (Terminal: pmset -g custom)
(2) Is the "standby" flag set to 0? If so, set it to 1. Wa-la! Done.
This fix is crazy and embarrassing b/c I was so close to it for so long. I tried changing my hibernation modes multiple times (sudo pmset -a hibernatemode X, where X=0,1,3,25,etc). I read about manipulating other PMSET settings that helped other people with newer MBPs, like "autopoweroff" and "autopoweroffdelay" --- settings that I do not have on the MBP early 2011 (check your settings: pmset -g cap). And most amazingly of all, I even messed with the "standbydelay" setting, trying to make it so long that my computer should never go into hibernation... Yet, from what I can tell by looking over my notes, I never simply set "standby" from 0 to 1.
There are interesting questions that arise due to this fix. For example, why did this problem persist on clean installs of OS Yosemite? Is "standby" being set to 0 the Yosemite default? I'm not sure. If it is, then Kappy was right: this was normal behavior... It just wasn't always the normal behavior...at least not for my MBP. Normal behavior (hibernatemode 3) used to be (and now is again) that the MBP goes into safe sleep, and then only after an allotted amount of time will it go into full-blown hibernation.
NOTE: the "standby" and "standbydelay" PMSET settings are not available in some earlier MBP models (e.g., my brother has a 2010 and does not have these settings); so if you're having a similar problem with an earlier model, this fix might not be of any help to you.

MacBook shuts down without warning during calibration (39% battery power)

My MacBook has been shutting down without warning during recent calibrations (which I've done approximately every two months). Most recently it shut down after 2 hours and 20 minutes on battery power with a battery reading of 39% -- i.e., nowhere close to the 0% of a fully rundown battery.
The result is that:
I'm not seeing the 'low battery' warning dialog before the computer shuts down; and
(ii) I'm not able to save current work and close all applications when the battery's charge gets low, before the computer goes to sleep (because it just shuts down without warning)
Can I do anything about this? Is it just an unavoidable indication of declining battery performance?
My MacBook is 15 months old. Current 'battery information' is listed below.
Thanks. Replies appreciated.
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4792
Remaining Capacity (mAh): 4790
Amperage (mA): 0
Voltage (mV): 12477
Cycle Count: 23
------------------------------

stevenray1 wrote:
1. I'm not sure how to match the path you listed re: the '1.3 battery update' to what's on my MacBook. Maybe I just don't understand how to interpret it, but I don't have a root folder (or any other folder) identified as 'MacBook.' When I used Spotlight, I also didn't come up with a BatteryUpdater.bundle. A file named BatteryUpdate2007001.pkg was all that Spotlight turned up.
On my MacBoook my hard drive that I boot from is named Mort's MacBook. Yours may be similar I don't know. It is the drive you boot from. Mines shows in finder as the top level drive. The next level in column view. Then you find the System file and go from there.
If your not sure what you named your drive or which one it is click the apple in the upper left corner and then pick *About This Mac* You then should see *Startup Disk* and next to that the name is what you refer too when you look for the folder path I gave.
2. You recommended resetting the SMC. However, the info file you provided a link for says it shouldn't be "necessary except as a last resort in cases where a hardware failure of the power management system is suspected." Does that accurately describe the condition I reported? Also, the problems listed as possible reasons to reset the SMC don't include the one I posted about.
The reason I suggest resetting the SMC is that your changing one of the components that is controlled by the functions of the SMC. The battery is a big part of the system which the battery update changes. To get it to be sure to recognize the new bundle you reset the SMC. The instructions linked are not all inclusive but if you don't want to reset it that is up to you.
3. Similarly, re: the 1.2 Battery Update, it's not clear to me that any of the listed 'symptoms' of a faulty battery apply in my case -- unless what I reported indicates a "+low charge capacity/runtime+." Does it?
The battery update instructions are again not all inclusive. If you don't want to do it that is fine. All I know is you have a MacBook Pro update installed at the moment. You don't have a MacBook Pro. This suggestion of mine has helped many people with problems as reported by you. You do not have to do anything you don't want. That is your choice. Is your battery cutting off at 39% considered normal operating or capacity to you? I personally would call it a faulty battery, but thats just me.
What would be your definition of a faulty battery?
4. Apparently, you had a faulty battery which Apple replaced. I wasn't sure from your message whether you had other things going on that made it clear you had a faulty battery, or only the same symptoms I reported. Were there other power-related problems in your case, or only, as you wrote "the same thing as yours except mine cut off at 28%"?
I guess I misunderstood your original post, everything yours was doing mine was doing except mine cut off at 28% not 39%. I can only give advice on what you post. Are there other things happening that you didn't mention?
My idea of a faulty battery must be different than yours. If I don't get warnings I should and the battery does not work like it used to then that is a faulty battery in my opinion.
If your not comfortable with any of my suggestions contact Apple support and maybe they can help you. Possibly one of the other posters on here can give you different advice that you agree with. Never do anything advised in the forums unless you agree with it.

MBP running out of battery power before sleeping - Help!

Hi
My MacBook Pro has been running out of battery power before the memory-saving sleep mode kicks in, so it dies with a little click of the HD. It's not a hibernation state as when I reattach the power supply it boots up a new session.
I've noticed this since upgrading to Snow Leopard last year, but put it down to an old battery that had 45% charge and wasn't powering the MBP properly. I now have a replacement A1175 5600mAh battery which is giving me 2-3hrs usage (which I'm pleased at), but now it still dies before sleeping!
I have tried to cycle the new battery, but can't. I have reset the SMC several times, with no effect.
I used to cycle the battery every week or two, running it down until it would no longer wake from sleep, recharge overnight etc, but now I can't do this because it will die before sleeping!
I've read quite a few articles over the net about this issue, but there seems like no cure. It's really annoying me now as I frequently work on the move and a dying MBP could potentially be disastrous.
Can anyone shed some light on this issue? Is there something I haven't tried yet? I think it's a late '06 MBP.
From System Profiler:
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 3 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP22.00A5.B07
SMC Version (system): 1.12f5
Battery Information:
Model Information:
Serial Number: ˇ{ïwl"Ó*%#Û˙� $«\
Manufacturer: SMP
Device name: ASMB012
Pack Lot Code: a0b0
PCB Lot Code: c0f1
Firmware Version: 8800
Hardware Revision: 0000
Cell Revision: 0000
Charge Information:
Charge remaining (mAh): 1320
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 5315
Health Information:
Cycle count: 12
Condition: Normal
Battery Installed: Yes
Amperage (mA): 1500
Voltage (mV): 11560
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: No
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 0
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 85
Revision: 0x0000
Family: 0x00ba
Serial Number: 0x001e1900
Charging: Yes

If you are not getting a warning, then there is something amiss with your battery. If a SMC reset and calibration does not fix the problem, then you may need to make an appointment at the genius bar and arrange to have your battery tested.
My old battery started doing the same thing--shutting down without warning. I replaced it, and the replacement battery started doing the exact same thing. I then returned the replacement, and the next replacement battery behaves in a normal fashion.
My first battery was worn out. My second battery was defective. My third battery is good.
Your battery should still be under warranty. Go back to where you got it and show them what it is doing and see if you can get a replacement.
Good luck!

Battery, Power, Deep Sleep and Spotlight problems after 10.9.4 update

Hi, I have a Macbook Pro 8,1 13in (Late 2011). I updated to the latest version of Mavericks (10.9.4) and iTunes on Sunday, right after that my macbook started to goes into Deep Sleep after closing the lid, even when the battery was 80% of charge. My battery normally lasts for almost 5 hours. After it went to deep sleep, the power bottom does not respond. Also, I have noticed that spotlight process in Monitor was consuming so huge amount of resources. This problem persists in Boot Camp. There is no way to turn the machine up without plugging it to the power cord. Sometimes it charges the battery as usual, sometimes it does not recognize the battery. Suddenly, the mac goes into sleep mode while I'm using it.
I have researching and troubleshooting in order to fix this but no solution. I have reset the PRAM and SMC. I made a backup of my files and installed Mavericks from the ground with external storage in order to erase the entire disk, no solution. I made an Internet Recovery and downgraded it to Lion, it worked for 2 hours and then I upgraded again to Mavericks (10.9.0) and the same problem came again, the upgraded to 10.9.4 and no solution at all.
I have searched on internet and there are other people experiencing this problem but nobody is able to bring a valid solution.
This is my battery's health:
Battery Information:
Model Information:
Serial Number: 9G1450LRJD3MA
Manufacturer: DP
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 201
Hardware Revision: 2
Cell Revision: 158
Charge Information:
Charge Remaining (mAh): 3204
Fully Charged: No
Charging: Yes
Full Charge Capacity (mAh): 4859
Health Information:
Cycle Count: 931
Condition: Normal
Battery Installed: Yes
Amperage (mA): 2406
Voltage (mV): 12273
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Wake on AC Change: No
Wake on Clamshell Open: Yes
Wake on LAN: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 0
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
Standby Delay: 4200
Standby Enabled: 0
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 60
Revision: 0x0000
Family: 0x0085
Serial Number: 0x008d9c78
Charging: Yes

Reseting the NVRAM/PRAM doesn't solve my problems.
Hi, since you have performed NVRAM /PRAM reset, try:
Intel-based Macs: Resetting the System Management Controller (SMC)
and if still issues persist, try: OS X: What is Safe Boot, Safe Mode?
Cheers

Forum Mods, Please make this a sticky: BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life

BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life
KB27705
Overview
The BlackBerry PlayBook may come to a power state where it is unable to power on; a Yellow LED may flash in a sequence of 5 flashes, the BlackBerry PlayBook may boot up to the BlackBerry PlayBook Logo and then power off, may not power on at all.
Discharge behavior under normal use:
Under normal active use, a battery drained to 10% will cause the device to prompt the BlackBerry PlayBook user (notification and audible beep)
Without connecting a charger the device will automatically shut down at 3.53V (0%)
Pressing the power button may allow successful boot, but it will turn off again very quickly
Discharge behavior under no use:
A device left unused but in ‘Stand By’ will warn the BlackBerry PlayBook user at 10% (notification and audible beep)
The warning may not be noticed and the device will go back to ‘Stand By’
Letting the device drain in standby mode drains the battery slower, but more completely
Device will still shut off at 3.53V (0%), but it less likely to successfully boot afterwards
Discharge behavior under 3.53V (0%):
If the device is left to shutoff, the battery will continue to drain below 3.53V due to quiescent current draw from the motherboard and the battery fuel gauge
With the battery between 2.7V-3.53V, pressing the power button causes the LED to flash a pattern (1 solid red light followed by 5 yellow blinks) to indicate low battery (PlayBook Tablet OS version 1.0.5, and above)
Below 2.7V there is no activity, or LED pattern displayed
Charge Behaviour:
The provided charger should be used to charge the device. The optional 12 volt rapid charger is may reduce charging times
to approximately 3 to 4 hrs. Standard Blackberry smartphone chargers, other AC adapter USB chargers, or computer USB ports
are not recommended for the sole purpose of charging the PlayBook as with these methods it may take more that 12 hours to
charge the BlackBerry Playbook.
If the battery voltage is below 3.53V(0%) then the charging behaviour is dependent on the software version. The charging code will limit the charging current to under 400 milliamps, during which time, it may take an hour to reach 3.53 Volts. Once the battery voltage rises past 3.53 volts, then "high-rate" charging will start. If, after charging the Tablet for 4 to 6 hours still does not result in LED activity, attempt to force power on the BlackBerry Playbook by pressing and holding only the Power Button for only 20 seconds.
Prior to BlackBerry Tablet OS 1.0.5:
A BlackBerry PlayBook will never charge while powered off in BlackBerry Tablet OS versions prior to 1.0.5.
The device will show a red light when the charger is connected and then nothing more
Repeated connection of the charger can recover the device in some instances.
Once the battery voltage rises above 3.53V the system will boot and the UI will show charging
Starting in BlackBerry Tablet OS 1.0.5:
The device will show a solid red LED, followed by a solid yellow LED as the device boots into charging mode. This is followed by a yellow pulsating LED indicating charging in progress.
The time span between the red and yellow lights can be as long as 45 seconds as the device boots into charging mode.
Once the yellow LED illuminates, the device can be started, but it is advisable to let it charge for at least 3.5 hours to achieve a sufficient charge.
The device will show a solid green LED once the device is fully charged.
Starting in BlackBerry Tablet OS 2.0.1:
Once the yellow LED begins pulsating indicating charging mode, if the BlackBerry PlayBook is disconnected from the charger, the following graphic will be displayed on the screen, indicating charging is not complete, and to reconnect the power source. The graphic will be displayed for 20 seconds before the BlackBerry® PlayBook powers off if the power source is not reconnected. The same graphic will also be displayed if the BlackBerry PlayBook is turned on and there is not sufficient power to perform the boot process.
If the BlackBerry PlayBook is plugged into a power source, and the power button is pressed to power on the device, the following graphic will be displayed if there is not sufficient power to perform the boot process. If this occurs, the BlackBerry PlayBook should be left plugged in to gain enough charge to boot.
Additional Information
Turning off the BlackBerry PlayBook and using standby mode.
Checking the battery power levelOn the status bar, tap the battery icon. When the battery power level is low, the BlackBerry PlayBook tablet will display a notification.
Enter standby modePress the Power button on the top of the BlackBerry PlayBook..
Exit standby modeSwipe down from the top frame to the bottom frame
Turn off the BlackBerry PlayBookPress and hold the Power button. Tap Shut Down.
To extend the BlackBerry PlayBook battery life, charge it regularly, close unused applications and keep the BlackBerry Playbook out of the sun and other hot places. The following may also be used to extend battery life:
Dim the screenOn the status bar, tap the Options icon (a gear), select the Screen tab and change the Brightness setting
Turn off the screen automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Backlight Time-out field
Enter standby mode automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Standby Time-out field
Turn off Wi-Fi when not in useOn the status bar, tap the Wireless icon and set the Wi-Fi switch to Off
Turn off Bluetooth connectivity when not in use
On the status bar, tap the Bluetooth icon and set the Bluetooth switch to Off
Pause apps when you show the home screen or switch between apps On the status bar, tap the Options icon, select the General tab and set the Application Behavior switch to Paused
With the upgrade to PlayBook OS 2.1.0.1032 the following message may be displayed when connecting the Playbook to a PC using the micro-USB cable:
Unable to charge battery with connected source
This message is displayed because the voltage provided is insufficient for charging. The USB voltage is limited to 384mA even if the maximum tolerance is 500mA. The voltage is limited to 384mA by design to avoid violating the USB specification which states USB devices cannot draw more than 500mA from the USB port.

TroyTempest wrote:
I guess it's not what you know but whom you know.
Yup! Glad you're here though. I appreciate your contributions in the forums myself.

X220 won't start up on battery power after BIOS update 1.24/1.25

This is a really strange issue.
I had been using my laptop with the oriiginal 1.10 (or whatever the very first one was) BIOS until yesterday with no problems. I head that there were some important fixes in the newer BIOS versions so I updated to 1.25. Everything seemed to be working fine until I went to work and turned on my laptop. It kept crashing before Windows would load (after the post screen but before any of the windows screens. It just stays black for a long time and then flashes a BSOD and restarts). I tried downgrading to BIOS 1.24 but the problem persisted.
It turns out that it does this whenever I try to start the computer without it plugged into the ac adaptor. When it is plugged in it starts up as normal but when unplugged it won't boot into windows. Once Windows is loaded I can unplug it and nothing happens but I still can't restart it without plugging it back in
Has anyone else encountered this problem? Is this a known issue? Any suggestions for what could be causing this strange behaviour?
If I can't get it figured out right away I will have to try to downgrade to the original BIOS version.

LOL! I just tried updating to 1.28 BIOS and had forgotten about the problem I had last time (when I tried updating to 1.24/1.25). I was just looking up what to do and came across this thread. I took me way too long to realize I was reading my own post from months ago! Boy am I slow.
I don't know if you are still subscribed to this thread Aamir but a hard reset is when you turn off the computer by holding down the power button until it turns off. Are you (were you) having the same issue with the newer BIOS versions as I am?
I think that the x220 is an amazing laptop spec-wise but are there ever a lot of driver/software problems! I keep trying to use the newer BIOS versions but I always have to revert to the original because Windows 7 won't start if I am on battery power (so basically anytime that I am not at home). I just bought a mSATA SSD (which is why I tried to use the newest firmware, I heard that older ones don't support them) and though the BIOS recongizes it, now Windows won't start if the SSD is installed! There is not much use in having a laptop with lots of ports and expansion options if it doesn't work when you use them!

Failure to boot on battery power

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