My MacBook suddenly turned off. And won't turn on

My MacBook suddenly turned off. There was a click sound and then nothing. I have tried to restart it but nothing happens. No sound no lights. It is plugged in and the power cord shows green. I have not damaged it in any way.....

Here is what to do;
1. Unplug everything from your computer.
2. Take off the bottom of your MacBook / Pro / Air. (There are usually 3 screws that are longer than the rest near the vent, remember where they go.)
3. Carefully unplug the battery from the logic board.
4. Wait 10 seconds.
5. Plug the battery back into the logic board.
6. Put the bottom cover back on.
7. Reboot the computer holding the "Option" key.
I posted this originally here. Re: My Mac randomly just turned off and now it wont turn back on, the charger light is faintly flashing green and amber?!?!

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Macbook Pro shut off and won't turn on or charge?

I purchased my Macbook Pro August 1st 2012 at Best Buy and in April it shut off for no reason and it wouldn't charge. Apple replaced the battery cable and my Macbook worked for a couple of weeks, then in May same thing happened and Apple replaced the MLB, a couple days later the same thing happens and Apple replaces the Magsafe board with cable. Then a few days later specific keys on the keyboard stop working and Apple replaces the topcase with keyboard. Now 120 days later my Macbook Pro shuts off and won't charge for the 4th time. My Macbook is now out of warranty but I don't think I should pay since this is the 4th time my MacBook Pro shuts off for no reason and won't charge. Yes I already tried reseting the smc, still didn't work. What could be causing this and is there anyway Apple will cover this since is the 4th time it shuts off for no reason?

Call Apple Customer relation and explain your situation. Have your receipts for the work that was already preformed on it and ask them to replace it with a new unit.

My MacBook suddenly shut down and won't turn back on - how do I get it to turn back on?

My MacBook suddenly shut down after freezing up and I cannot get it to turn back on again. I tried the suggestions in the manual and none of them worked to turn it back on. Is there something I am not doing correctly? The little green light on the charger connector is green but not as bright as normal, it was charged by over 70% before it shut down, so I do not think it is a battery problem. Is there anything I can do to turn it back on? Thank you for any help given, I really appreciate it.

If it won't bong, then try an SMC reset.
http://support.apple.com/kb/HT3964
Can you boot in Safe Mode?
http://support.apple.com/kb/HT1564
Did you uninstall it this way?
http://www.microsoft.com/getsilverlight/get-started/install/removing-silverlight -mac.aspx

865G Neo2 suddenly powers off and won't reboot

I originally posted this in another topic but I guess I should have started a new one so here's the original post:
Motherboard: 865G Neo2 (MS-6728) Ver 1.(latest bios update 2.50); Intel Pentium 4 2.40GHz Northwood; Hitachi 80Gb hds722580vlat20; PowerColor ATI Radeon 9200 SE 128Mb R92LE-C3S (identified in windows as ATI Radeon 9250); 2GB DDR no-name ram; Macron MPT-400 400W power supply; Windows XP Professional SP2
Power supply stats:
+5V : 35A
+12V : 15A
-5V : 0.5A
-12V : 0.8A
+3.3 : 22A
+5VSB : 3A
All drivers in windows are up to date.
Problem is that the computer will just suddenly turn off. If you try to turn it on again it won't turn on. Removing the bios battery does nothing. Only way to make the computer boot again is to turn the power supply off with the switch on the back, wait a little while and then turn it back on. Very annoying as this is my work pc so the computer just suddenly turning off can be a real problem making me lose work etc. It even caused windows to become corrupt once not even allowing me to go into the recovery console to try and fix it. Had to do a repair install to fix it.
Any suggestions as to what would be causing it? I can only imagine that it's a MB or power supply problem. The fact that I can turn off the powersupply wait a little while and then am able to boot suggests to me that it's the motherboard. Some capicitors have to discharge and clear memory or something before the system will boot again. I'm at a loss.

Well the computer ran all day yesterday without dying once. Then this morning it died a short while after turning the computer on. So I looked around for another PSU and put that in. Unfortunately it's only rated as a 300W but I noticed that it has about the same max power for the combined 3.3V + 5V output being 200W compared to the previous 210W. Anyway even though it is a less powerful PSU I figure that the system I'm using isn't doing that much intensive work so it should be fine. So if this one also exhibits the same problems as the last one I will conclude that it's the motherboard and not the PSU.
Problem is that it will die just randomly whther it's under load or not or even just sitting doing nothing. So even if it doesn't die again today it doesn't mean that it's fixed. Ohwell... I'll tell you how it goes.

MacBook randomly shuts off and won't charge

I have a 13 inch MacBook that's less than a year old. For the past several weeks I've been having a problem with the computer randomly shutting down. It usually does this even though it's running on A/C power.
When it happens, the computer shuts off and the charger no longer works (ie no light). The computer will turn right back on if I push the button, but I have to unplug and re-plug the charger several times before I can get the light to come back on. Also, after the computer is turned back on, my date/time settings are always wrong, and my computer doesn't automatically remember my wireless network. Any help would be great.

Hi, I'm having the same problem stated. My Macbook is a late 2008 model and has started doing this. Here are my stats.
Battery Information:
Model Information:
Serial Number: 6N8450VDV13C
Manufacturer: SMP
Device name: bq20z951
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 002a
Hardware Revision: 000a
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 1486
Fully charged: No
Charging: No
Full charge capacity (mAh): 4043
Health Information:
Cycle count: 761
Condition: Normal
Battery Installed: Yes
Amperage (mA): -1521
Voltage (mV): 11171
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
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 5
Wake On AC Change: No
Wake On Clamshell Open: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: No
Charging: No

My macbook randomly shut off and won't stay on?

I was watching Netflix and had a few tabs open on my 2011 MacBook Pro. It randomly shut off and it wouldn't turn back on. I reset the smc and the computer would start up, but it wouldn't stay on for more than 20 seconds. The battery is fully charged up. Does anyone have any idea what happened or how to fix it? Thanks!

Hi Macklaird,
If you are having random shutdowns or restarts with your MacBook Pro, you may find the troubleshooting steps outlined in the following article helpful:
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem."
http://support.apple.com/kb/TS4636
Regards,
- Brenden

MacBook Pro shut off and won't turn on back? what should i do?

SO i was studying for my midterms and i charged my phone thru my computer and after 20 mins my laptop shut down for no reason and i have 52% battery and i tried to charge my laptop but my charger lights was dimming and after a minute won't work what should i do? is there any people experience this ? please help me? before i go apple store i don't wanna pay hella money

Troubleshooting: My computer won't turn on
This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.

2007 MBPro suddenly switches off and won't turn on for days..

..but then works fine again for a few weeks before it dies again. The battery is still OK and the charger has been changed recently. When it's working it's working solid, on battery as well as plugged-in.
But every few weeks, all of a sudden it just completely dies and there's is nothing I can do to revive it. I've tried everything. I even opened it a few times to make sure there are no loose cables or anything. It's annoying because I don't want to throw it out as long as it's working and it just lies around during the its "dead phases".
Could it be the powermanager or something? Would a fix be worth it? I'm thinking of trying to fix it myself.

If System Profiler shows it as a MacBookPro3,1 or 4,1, you may wish to have Apple look at it. There is a known issue with the video chipset in those models (Mid-Late 2007 and Early 2008):
http://support.apple.com/kb/TS2377
If affected, they will repalce the logic board at no cost to you. The test has to be made in an Apple Store or AASP to qualify.
It's worth making sure that is NOT the problem before doing further troubleshooting.

My iphone 4s suddenly cut off and won't cut back on.

It absolutely will not turn on. I tried holding the home and sleep button, but it failed. I tried charging it, and it only flashes the apple logo on and off again. I tried holding the buttons again while it did this, but it only tells me to plug it into itunes.
I tried plugging it into my computer to reboot it from itunes, but guess what? Itunes won't recognize it. My computer, and every computer I"ve tried plugging it into won't recognize it either. Itunes is up to date, and I've tried every trouble shooting idea I"ve seen on this forum.
I just bought this phone four months ago. It has been in an otterbox since the moment I opened it. It is not dinged, it is not scratched, it is not shattered... it is in absolutely perfect condition. It's absolutely positively ridiculous that my brand new phone is now a worthless piece of plastic unless I want to spend $200 to send it in to be fixed.
I'm so peeved, and I'd be really grateful to anyone who can help me.

If it's "brand new" it has a 1 year warranty. Take it to an Apple store and they will replace it. You can check the warranty status here: Apple - Support - Check Your Service and Support Coverage
You can also try to restore it using Recovery Mode

My iphone has suddenly turned off and won't turn back on

This is a replacement phone as mine broke after updating I've only had it 3 months and now it's suddenly gone off and won't turn on I've tried the reset but it's totally blank if I return to the shop will I be made to pay again for a replacement??

You say your tried a reset, holding the sleep/wake and home buttons until you see the Apple logo? How long did you hold the buttons, it could take up to 30 seconds of holding for it to work. If this doesn't do it, then plug the device into the charger for a minimum of 30 minutes, then try the reset again. If you still cannot reset the device, make an appointment for the Genius Bar. Paying for a replacement depends on the warranty status of that device.
If your other device was under warranty, the replacement would have a warranty of 90 days or the balance of the original phone warranty, whichever is the longest.

My phone all of the sudden is off and will not turn back on. It's a brand new iPhone 5

My phone all of the sudden is off and won't turn back on.

Hi Ashley0607,
Welcome to the Support Communities!
I'm sorry to hear you are having issues with your iPhone 5.
Follow the steps below if the iPhone is not powering on:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
After at least 15 minutes, if:
The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
If the display turns on, go to step 4.
If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
I hope this information helps ....
Have a great day!
- Judy

IMac G5 shuts off and won't restart

Mac suddenly shuts off, and won't restart. Begins to boot, but shuts down again, sometimes after only a few seconds and before the chime, sometimes after 30 seconds, sometimes after several minutes. After many attempts, can sometimes get restarted. If I hold in the power button, I get a long tone, and then sometimes get a gray screen with Linux style text, and if I type mac-boot as prompted, it will usually reboot. Then its good for a day, or several days but eventually, will go off and I can't reliably get back to that gray screen with text.
Not a techie, or Linux fluent...just got there by accident.
Is there something I can do / reset / or replace to fix this? (Yes, I know the computer's old, but I'm not ready to go to the Intel chip and the expense of repurchasing all my software yet!!)
Thanks for any help.

I have the same 1.8 GHz iMAC G5, and had the same problem of the computer shutting off abruptly, and then not starting up - shutting down after the chime, or sometime during the start-up process (I don't know about the gray screen - never tried that). Eventually the computer just wouldn't turn on at all - now it's dead.
I found this Apple support article recently, which shows how to diagnose a dead iMac G5, to see whether the computer has a bad power supply or a bad logic board. It might be helpful - in my case, it points to a bad logic board. Maybe both are bad (?). The procedure is for a dead computer, but maybe it would show something in your case too.
http://support.apple.com/kb/HT2173
Good luck. I don't how much it would cost to put in a new logic board or power supply. I love the monitor on the G5 iMac (beautiful non-glossy), and I wish I knew of a way to use the monitor by itself.

After upgrading to mavericks my mac shut off and won't come back on

I upgraded to Mavericks and my 2013 macbook pro shut off and won't come back on. When I push the start button I can hear the chime and then my sleep light blinks really fast and then shuts off completely. All I get is a white screen with the loading circle just going around and around. I tried resetting the pram but that didn't work. Any ideas?

Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Alternatively, see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

IPhone 4S Shut itself off and won't turn on

my iphone 4s has turned off and won't turn on.
it doesn't respond to the power button and won't respond to being plugged in.
the last time I used it was about an hour before I noticed it.
the last thing I did was put one photo on to my photostream.
it had been sitting in an air conditioning room, and on a desk during the whole hour or so I wasn't using it.
anyone have any ideas what might be wrong with it?
i am 100% sure I'll have to take it to a store to figure it out unless it suddenly works.. but any ideas would be helpful....

My 4s did the same thing yesterday. I locked the screen, then about ten minutes later I went to use it and nothing would work. Like the phone was completely dead. I tried everything, plugging it in, reboot, nothing at all worked. Then about five minutes later I hit the lock button again and the apple logo appeared and it started rebooting. Not sure what happened!!

I left my 4s in the car for apprx 35 mins in 35 degree weather and the phone completely shut off and won't turn back on. the battery was fully charged

i left my 4s in the car for apprx 35 mins in 35 degree weather and the phone completely shut off and won't turn back on. the battery was fully charged. please help it is my only ways of communicating beyond my macbook

It probably overheated and shut down. Hold the HOME and SLEEP buttons until an Apple logo appears. This will take 10 to 15 seconds of holding both buttons.

My MacBook suddenly turned off. And won't turn on

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