MacBook won't start up after overheat shutdown.

My MacBook shutdown due to overheating. now I can't restart it.

What happens when you try to restart it? Have you tried a safe start by holding the shift key down when booting?
If you can't get anything to work, try running the Apple hardware test. When prompted, choose the extended test, which can take over an hour to run.

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My MacBook won't start up after downloading new iOS

I finally decided to download the newsy update for my 2012 MacBook Pro, which I believe to be the iOS x Mavericks (? not 100% sure, just whichever is the most recent, I think before Mavericks it was Mountain Lion) and it downloaded and restarted, but was stuck on the start up white screen with apple logo. I forced shutdown and then tried to start it again, in which it was stuck at the start up screen again. I then forced shutdown and tried a safeboot with the shift key but even before the safeboot bar is even 1/10 of the way down, it shuts down again. This happens every time I try to power on or safeboot. I'm unsure exactly what the iOS disc that supposedly came with the notebook is, and so I'm unsure of what to do next, any help would be appreciated thank you!

If the Safe boot has failed, I see two options, one is to try and reinstall the original OS or two take the MBP to an Apple store genius bar for a free evaluation.
https://discussions.apple.com/docs/DOC-6162
Ciao.

MacBook won't start up after installing new Memory

I have a Macbook White from the year of 2009. It is currently running with 2GB of Memory. I bought 4GB Memory online for my MacBook, so I could get it to run twice as fast.
I turned off my MacBook, removed the battery, and then unscrewed that 'silver thing'. The one that protects and covers the Memory. I took out the two memory 'parts' and then I tried to insert the new ones. I did not get any kind of 'click sound' or what so ever. They were hard to push in and no matter what I did, I was able to pull them out again without using that 'flicker' or what it is called. The thing used to pull the Memory out. I then inserted my old Memory to check if that worked and it did. They made a very small sound and the Memory sort of disappeared into the machine. They were not loose. The major problem was that the other two new Memory parts were 'loose' and would not 'lock' in the computer. When I tried to turn on my MacBook after inserting the new Memory, the screen was black and it made a weird sound like every 3th second. It did this for about 20 seconds and then I turned it off using the power button.
What do I need to do?
Thanks for reading.

You probably bought the wrong RAM that has different pin assignments, so it won't fit in the slot. Return it.
I bought 4GB Memory online for my MacBook, so I could get it to run twice as fast.
Doubling the memory does not make your computer run twice as fast.

MacBook won't start up after installing iTunes 8 & updates ...??

My MacBook is a little more than a year old (read, no longer under warranty ...) and it's currently in a coma.
Nothing was out of the ordinary prior to the MacBook going weird - I downloaded a bunch of photos from my camera, ejected a USB drive and immediately after that I tried to launch iPhoto - it froze and I tried to force quit (several times) without success. I then pressed the power button, and that was the last time I saw my desktop.
Whenever I press the power button to try to turn it on, the Apple logo comes on (but no spinning wheelie) and then a grey screen comes up saying my MacBook needs to be restarted - either press the power button for a few seconds or try the reset button (which is where???).
Anyway, for the next two and a half hours, I tried everything I could find on the forums to revive my MacBook. I did the PRAM thing, pulled out the battery, did the Cmd+S/V gig (that went no where either, just got stuck on a black screen with lots of words after a while), got my old OS X install disc out (couldn't find the Leopard at 2:30AM ...) ran through the whole repair thing ... Point is, I'm still looking at the screen that's telling me to restart my computer.
I've gone through the forums here and it seems like some people with year-old'ish MacBooks who have installed iTunes 8 as well as the latest software updates seem to have the same problem. Now I know it's my fault I didn't backup my data so I can't just wipe the HDD and hope for the best. If I knew installing iTunes 8 would cause this, I wouldn't have bought the new iPod Touch 32GB, which requires the iTunes 8 to work. And I usually install all the updates Apple tells me to install ... maybe this is what you get for being gullible.
Anyway, I think I'm going to have to take it to a service centre, who has quoted me at least $75 to $250 to have the thing "diagnosed", let alone fixed.
How do I know if I broke the MacBook or iTunes & the software updates did? Or are MacBooks really pre-programmed to die after the one year warranty expires ......?? Eitherway, I'm really put off by Apple right now.

Another victim!
Try booting up from the install disc (insert and hold down C), then run disk utility and and check your drive for errors, and then if possible try fixing them.
This didn't work for me, however after deleting my hard drive and repeating the above procedure no errors were found, and after a reinstallation of OSX my computer is working although extremely slow.
As for recovering your data I'm not sure. So far I haven't heard of it being done, although I have heard of new hard drives needing to be purchased.
Good luck. And spread the word!

MacBook won't start up after update

Last night I updated my MacBook and now it will not turn on past the White screan with the grey apple logo.
I reset the PRAM an the PMU, held down the D key an tested for hardware problems and nothing has helped.
Any help would be very greatly appreciated as I am working on an important project on my laptop.
Thanks in advance, Hannah.

put you the mac os x cd in the drive and when you start up the system press the C letter and hold it until it is loaded with the cd then find the open disk utility option from the utillities section on the top bar then try to verify the permissions and repair them this should work and bring up the os
you can use this link for more information and step by step guide : http://kb.wisc.edu/helpdesk/page.php?id=3810

Macbook won't start up after updates.

I installed some software updates yesterday inlcuding Itunes 10.5, Safari and some other things. But once it tried to restart all I got was a black screen and a constant whirring noise. I left it for a while but nothing happened, occasionally it flickered for a split second.
I held down the power button and restarted it and it worked but would shut down everytime I lowered the lid. Then I put it to sleep manually and when I tried to use it, the black screen and whirring noises came back and it's still like that. I'm not sure what to do, help?
Fairly new Macbook Pro 13'' purchased in about April this year

Another victim!
Try booting up from the install disc (insert and hold down C), then run disk utility and and check your drive for errors, and then if possible try fixing them.
This didn't work for me, however after deleting my hard drive and repeating the above procedure no errors were found, and after a reinstallation of OSX my computer is working although extremely slow.
As for recovering your data I'm not sure. So far I haven't heard of it being done, although I have heard of new hard drives needing to be purchased.
Good luck. And spread the word!

My MacBook won't start up. After turn it on I get a grey screen with an apple in center and a circle below with lines around it and a blank bar below that. How can I get it to get beyond this screen?

MacBook won't start. After I power up, I get a light grey screen with an apple in the middle, a circle with lines moving around it and a blank grey bar below that. It won,t get beyond this. Please offer suggestions.

I have the exact same problem and waited it out and got to my homescreen. Whateve the problem is fried my bluetooth and my trackpad. I tried starting it again and couldn't even get to homescreen, it stayed on the bluescreen with the wheel of death. So, I took it to genius bar today. I was informed that my logic board is fried and it needs to be replaced. $300 repair that I'm looking at...

'09 MacBook Pro won't start up after installing new hard drive and restoring from an external hard drive.

I am in the process of replacing my hard drive and have run into a problem. I reinstalled OSX 10.6.3 using a DVD I bought off Amazon. That went well and I then restored my hard drive using an external and Time Machine.
After that, things still looked good but I couldn't log in to my user (and access my MacBook) because my password wasn't working even though my hint was correct. Yes, I am POSITIVE my password was correct; I even tried a couple other passwords to humor myself. I then gave up and decided to restart the computer.
Now my MacBook won't start up at all. It goes o a gray screen with a still loading symbol for a couple minutes and then goes to a solid light blue screen. I've tried starting up while holding command+R and I tied holding just command and neither worked.
Did I install the wrong OSX because I didn't use the same DVD that came with the laptop? Is there something wrong with my hard drive already?
Please help =[

You probably bought the wrong RAM that has different pin assignments, so it won't fit in the slot. Return it.
I bought 4GB Memory online for my MacBook, so I could get it to run twice as fast.
Doubling the memory does not make your computer run twice as fast.

MacBook Pro won't start up after chime, MacBook Pro won't start up after chime

MacBook Pro won't start up after chime, MacBook Pro won't start up after chime

Try resetting the SMC.
Barry

After 10.4.11 upgrade Macbook won't start can't boot from external HD

Hi guys,
I just suffer as all other that after try ti install the 10.4.11 update my macbook won't start, I have a external HD with a image of my macbook but went I press and hold the option key I only see the bootcamp parttion and my internal HD, I don't see the external HD.
How can I boot from my external HD if I have a bootcamp partition?
Thanks

I follow the robotobi post and solve this issue.
Thanks robotobi

After installing latest update Macbook won't start up.

After installing the latest update my macbook won't start up. Instead of the login screen I get a flashing map icon with a question mark. My uncle says that means it can't find the startup disk and I had to startup from the install disk holding C but it didn't work. I'm quite desperate because I need my macbook for school (writing & producing music). I type this on a friend's computer... How can I fix this? Or do I really have to go to a mac store and part from my macbook for an unknown time...? :'(
I don't exactly know what version I have (can't check it now either) but it's at least 10.6.something and I always install the updates...

Hi
Anything unusual happen during the 10.5.3 update installation phase?
What type of iMac are you using? Your tag says G5 but also Intel core processors - it can't be both.
Try this:
-First unplug your computer and wait 10 minutes
-Next, simultaneously reinsert the power cord while pressing the power button for 5 seconds then release
-Press the power button again to start the computer - this resets the computer's system management unit (SMU) which controls your machines power functions.
-Next, press/hold down the P/R/option/command keys for 3 Apple chimes. This clears the machine's PRAM. After the 3rd chime release those keys and immediately hold down the Shift key to put the machine into Safe User Mode
-If you get to a log-in screen (may take several minutes as repair functions are occurring on the boot), log-in. When the login is complete, restart the computer as usual.
If no go, I suggest taking the machine to a certified Apple tech, or if you live near an Apple store to the Genius Bar.
Post back
Message was edited by: Hawaiian_Starman

Macbook won't start after recent update

Hi Guys,
Got a problem with a month old Macbook. Clicked for the recent updates and after it restarting the Macbook won't start up past the Apple logo and the rotating symbol beneath it.
Any ideas ? Thanks in advance
Nick

Hi Nick,
Check out these two articles:
http://support.apple.com/kb/TS1541 (Mac OS X 10.5: Troubleshooting installation, startup, and login issues)
http://support.apple.com/kb/HT2956 (Troubleshooting Mac OS X installation from CD or DVD)
Running Disk Utility and trying to verify the startup volume or starting up in Safe Mode would probably be the next best course of action.

Macbook won't start - apple icon turns to circle with diagonal line/slash

My Macbook won't start. When I turn on the power, the apple icon appears but then after a while it changes to a circle with a diagonal line/slash, then it just shows a gray screen.
The last time I used the computer I did several software updates. Could this be causing the problem? Any suggestions for getting my computer operating again?
Thanks for any help/advice.

Yup, i encountered the same experience after a strange failed USB-loading, and a sudden shutdown of my macbook.
Luckily i manage to "safe-boot" (pressing "Shift" key once starting up the mac) my macbook so that i can save the necessary files before will lose them all.
After that i popped-in my SL Installation DVD, and did the reinstallation process. Fortunately, everything works as charm and everything is back to normal after Spotlight has done it's hard work.
Happy Apple user once again.

MacBook won't start on battery/shuts down when power adapter is removed

Help & advice needed please.
My MacBook won't start without external power, it gives a whir then a click then nothing. Once started up, if I remove the external power it just shuts off.
The battery shows at 98% & charging. Coconut Battery shows the following:
Current battery charge 4126 (& increasing as I type)
Maximum battery charge 4200
Current battery capacity 4200
Original battery capacity 5200
80%
Battery loadcycles 111
Age of your Mac 6 months
Charger connected yes
Battery is charging yes
Does anyone have a clue why the Mac won't power itself on the battery when everything else seems like it works?
Cheers!

As of today, my MacBook and I have been together for 40 days. Yesterday, while I was happily surfing (on battery), it powered down with no warning. Okay, these things happen. I plugged it in, restarted, and all seemed to be fine. Battery was about 70%. I did other things on my other machines and when it was about 90%, unplugged it and everything was good. This morning after using it unplugged for 1.5 hours it did the same thing, but decided to only work with the power adapter, not on battery alone. When trying to boot without AC, it would try to spin the CD and then fall back into off. When on AC, if I pulled the adapter, it would last two seconds and go blank. I made an appt. with the Apple store (Fashion Show Mall, Las Vegas) for 3:20pm. I got there right at 3:20pm and the monitors showed I was 5th in line. Store was fairly packed, at least one patron at every display item. Monitors also said the next MacGenius appt. was "approx. 8:30pm." Glad I made an appt! I was served about 15 min. later, during which time the monitors had changed to "No more MacGenius appts. available today, please try tomorrow." However, one guy came by without an appt. and was told he would be put on standby and to come back in 30 min.
Once I explained my issue with my MacBook battery, my Genius tried one of his batteries. "I just want to make sure it's your battery and not your motherboard." My machine worked fine, so he said "No problem, I'll have you out of here in 10 minutes." He got me a brand new battery, tested it, and put my old one in a box on the rear counter with four others. He pulled the serial number from the "About this Mac" area, didn't need my receipt for purchase date or anything. I had even printed this page: http://www.apple.com/support/macbook_macbookpro/batteryupdate/ to use as ammunition, but didn't need it. He did approve highly of my dashboard widget "iStat pro", available here: http://islayer.com/.
So the battery issue is a very common problem, and one that Apple has tried to deal with as painlessly as possible for the consumer. My Genius did ask if the battery showed an "X" in the icon bar, and I said no. Just wouldn't run on battery. On the way out of the store, one of the 3 MacBooks, in fact the one closest to the door, had an "X" on the battery icon. When I unplugged the power, it shut down immediately! The moral of the story is to contact Apple immediately with problems and give them a chance to fix them. Hope this helps others.

How do I backup all my files if my Macbook won't start up?

So a few days ago, my dad and I got into a fight - he reacted by pouring coffee all over my macbook, then continuously slammed it on the floor. There wasn't really much I could do for my macbook then, except the basic procedure of powering it off, turning it upside down, then waiting for a couple of days to use it. Luckily enough, my macbook was able to turn on, but it got stuck on the logo screen and couldn't go any further than that.
I had already planned to diagnose my macbook after an earlier water spill, and spent over $500 on tools/replacements. I bought an external hard drive to backup my computer files with before diagnosing it - but now I can't really do that since my macbook won't start up. Is there any way I can boot it up just to back up my files before they get lost forever?

yes, the HD contains all you data, SEE PIC BELOW of macbook
Do you have 2 HD in your macbook? Some macbooks are modified and have removed DVD/Superdrives and contain a second hard drive (if you didnt do that, it isnt in there)
The HD itself is sealed, however the internal armature and heads are fragile, these are like records and needle.
obviously torturing these HD heads is like shaking an old record player with its needle and arm (bad idea)
The HD is like a metal sealed box (in simple explanation)....which is GOOD.....since liquid doesnt get in there...
what is BAD is what is inside that box is fragile
also what is bad is that the underside of that "BOX" contains a control board which CAN get ruined by nasty liquids.
if this was also possible to do with the hard drive.
No, dont think of putting any liquid ON / IN the HD, ..as said the HD is sealed, but it does have a circuit board on it (controller board) you cant see in this pic above,.....nasty liquid on it can of course fry the ability to access the data ON the HD platters inside......data recovery experts can get around this,....so can I, but its costly and very "painful" to do.
see picture of that control board here> http://www.irisvista.com/tech/laptops/Toshiba-Portege-R500/small/remove-hard-dri ve-10sm.jpg
inside of a HD:

MacBook won't start up after overheat shutdown.

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