TS1713 Mac won't turn on.

Mac won't turn on, it's plugged in

Look at the steps in this Apple support article:
http://support.apple.com/kb/TS1367?viewlocale=en_US
Ciao.

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Today my mac won't turn on at all...the light at the front is remaining on and at a constant brightness however the screen is still black! I'm not sure what to do next?

today my mac won't turn on at all...the light at the front is remaining on and at a constant brightness however the screen is still black! I'm not sure what to do next?

If you can log in blindly or using the flashlight method, it is possible your screen brightness somehow got set all the way to nothing. I don't have my Macbook with me right now to test it out but I believe it may not be possible to adjust the brightness at the log-in screen so you have to be able to log in first (though I could be wrong on that).

My mac won't turn on

My mac won't turn on and I want to try and back up my files in case it needs to be reformatted. Is this possible if it won't turn on?

See this Apple note on systems that won't power up. If the system won't power on, the only way to backup your files is to remove the hard drive from the system, and either put it into a case or attach a cable so another system can read it.

My mac won't turn on. It has the apple sign but a little loading sign under it, for about an hour

My mac won't turn on. It has the apple sign but a little loading sign under it, for about an hour

Will it boot up in safe mode?
http://support.apple.com/kb/ph11212
or can you enter single-user mode?
https://support.apple.com/kb/ht1492
What version of OSX are you running?

My Mac won't turn back on after I updated the software

My Mac won't turn on

Pull your hard drives.
Put in your OEM DVD
Hold down the letter d on startup and run Apple Hardware Test
Put in your latest OS X DVD and hold c
Does it do both.
Oh, and Reset SMC.
http://www.apple.com/support/macpro
And make sure you have backups, bootable backups, and just WHAT version OS X?? what update(s)?
.... we are not going to know.... Lion? 10.6.8?

Installed Yosemite...Mac won't turn off.

Installed yosemite, now my mac won’t turn off completely. All apps are off. After choosing shut down, It doesn’t shut the white light. It looks like it’s in power down mode. But nothing will turn it back on except having to hold down the power button to completely turn it off in Yosemite. then pressing it again to turn it back on. Help!!!!

LRD777 wrote:
Installed yosemite, now my mac won’t turn off completely. All apps are off. After choosing shut down, It doesn’t shut the white light. It looks like it’s in power down mode. But nothing will turn it back on except having to hold down the power button to completely turn it off in Yosemite. then pressing it again to turn it back on. Help!!!!

How do i troubleshoot - after 3 years i-mac Won't turn on!

All of a sudden my I-Mac all in one desktop will not turn on when I press the power button. Ideas?

Intel-based iMac: What to do if your computer won't turn on

What does it mean when my Mac won't turn on and it's charging low?

My MacBook suddenly just turned off and won't turn on anymore. There's just a blank screen and when I charge it, the green light is low.

Resetting SMC could solve the problem.
Intel-based Macs: Resetting the System Management Controller (SMC)

HT3964 My Mac won't turn on.

My Mac just won't turn on. It's plugged in. Nothing happens. Help!!!!!

Take it to the local Apple Store or AASP for repair.

TS1367 Mac won't turn on

help, mac air won't turn on. No light. No nothing. Checked different power points but still no sign of life. Can anyone give me an idea of what is wrong?

Try replacing the battery. If you can't replace the battery take it to your nearest Apple Genius Bar or Apple Repair Centre.

Mac won't turn on after software update ( newest update if mountain lion)

Update my Mac book pro with newest software update if mountain loin and now won't turn on?!?!?

Intel-Based Apple Portables: Troubleshooting a computer that will not power on

HELP, My MAC won't turn ON

My computer won't turn on. When you hit the power button you can hear the fans turn on but thats about it. This has happened in the past, it's not turned on for about 3 days but then all of sudden it starts working again. Its been about 5 days now and I'm starting to get worried. I hear the fans running but thats it, I can't eject the CD tray and I can't see any video. What should I do??
iMac g4 Mac OS X (10.4.5)

CDiddyHustle,
Welcome to Apple Discussions, Sorry about the circumstances!
To help identify what's at fault could you please post back with the following details:
Do you get the Start-Up chime?
Does the Optical Mouse light up/Caps Lock light come on or off?
If you shine a torch at the display and look closely can you see any images?
If you have a VGA display adaptor - can you see any display if you plug it in to your TV or similar.
If you reset the PRAM - hold down the <apple>
<r><alt>keys in during start-up until you hear the computer appear to restart.
If you hold down the mouse button during start-up does the CD tray open?
Was the computer showing any other symptoms recently - dimming display, Kernel panics, poor USB connections, grinding noises in the hard disk?
Do you have a clean electrical supply in your part of the world?
mrtotes

Turn on! My mac won't turn on after sleeping!

Ever had a problem where your computer won't turn on after sleeping for a few minutes? (I've discovered that too many downloads cause this) Anyway... have you ever tried pushing the power button for one second? Try it! It's been working for me! Hope this helped!
(If it still won't turn on, try typing in letters randomly for one minute. Just type anything like: asdjhas)

Try resetting the SMC and PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
About NVRAM and PRAM

My mac won't turn on and when I plug in my charger the light flickers but it won't charge my mac

It suddenly turned off when I was using it and won't turn on and the charger light flickers and won't charge my mac

If you have another power cord try that, maybe you'll get lucky.

My mac won't turn on again, it just shows the apple logo and some code

My mac was freezing up a bit while trying to get onto lanaboards.com so I decided to restart it. I figured i might as well update it at the same time. So i did that and chose the restart option that comes up when you update. It seemed like the update went through, but then it told me that it couldn't update but i was asked if i wanted to restart it, so i did. For some reason it didn't restart for a couple of minutes so i turned it off by pressing the on/off button. When i turned it back on it made the sound and then the grey background with the Apple logo appeared. Suddenly this code comes up using the word "panic" a couple of times. I'm not gonna type the whole thing cause it's kina long. It also says "Mac OS version: not yet set" (maybe cause i tried to update?) and "Kernel version: David Kernel version 12.2.1" It also says "debugger called: <panic>"
I won't be able to get it to the apple store for a week because everything closes down on thursday because of Easter and the buses seem to not go tomorrow and no one can drive me. I hope there's something i can do cause i have an important exam (100% of my grade) in two weeks so I'm freaking out a bit here. I also have some stuff due next week that just went up.
I really hope someone can help me, or at least know what may be the problem.
PS. I'm not 100% sure which operating system I have so i chose what i assume is the second newest iOS cause I know i have iOS at least
PS 2: My hard disc crashed about two months ago and was fixed at my local apple supplier, if that may have anything to do with the matter.

you are not in MacBook Pro forum, so might be harder to swap out and replace hard drive but you should definitely have had them do that or even yourself.
Make sure you are at least using TimeMachine AND another backup method to clone your system drive so you always have a working 'spare' backup drive you can boot and work from - USB3 is good, TimeMachine even works decently for some on USB 2.0
Finding out why and troubleshooting a panic is a matter of trial and error after taking a look at what hardware, what software you installed (and some of which should be removed), even whether it is triggered by heat from processor or RAM (memory) errors, and memory errors can be triggered by software.
Reset SMC
http://support.apple.com/kb/HT3964
Resetting NVRAM
http://support.apple.com/kb/HT1379
Safe Mac Guide
http://www.reedcorner.net/mpg/
About Mac OS X Kernel Panics:
http://support.apple.com/kb/TS3742
Resolving Kernal Panics
http://www.thexlab.com/faqs/kernelpanics.html
http://reviews.cnet.com/8301-13727_7-10344626-263.html
http://macs.about.com/od/usingyourmac/qt/Troubleshooting-Os-X-Kernel-Panics.htm
http://support.apple.com/kb/TS3742
There’s trouble in my laptop paradise. I ended that with this caveat:
It’s much more comfortable to type on the 2011 model, with one big exception: the 2011 model runs much hotter.
I need more time to form a concrete opinion, but it seems so far that this CPU’s awesome performance definitely comes at a cost of increased heat and reduced battery life. For my intended usage as a desktop most of the time, that’s an acceptable tradeoff.
This turned out to be worse than I thought it would be, and today, the last day of my return period, I decided to return it and exchange it for a slower model.
The problem
Not only does the 2011 15” MacBook Pro run much hotter than previous generations, but as a result, the fans very frequently kick up to full speed (6200 RPM), greatly annoying anyone in the area who’s not wearing headphones.
I’ve done a lot of Google research and impromptu Twitter surveys, and this seems like a very common problem, exacerbated by a number of factors:
The quad-core i7 CPUs in the 15” run very hot, with a TDP of 45W, 10W higher than the previous dual-cores. Many people speculate that the 15” case and fan design just isn’t designed for CPUs that need this much cooling regularly.
The Core i7 CPU can use Intel’s Turbo Boost to dramatically overclock one CPU core to handle single-threaded loads whenever power and heat allow. It therefore hits its maximum TDP often when just one core is being maxed out, such as when Spotlight or Backblaze index new files, or when Time Machine is backing up.
The 2.2 and 2.3 GHz 15” models come with an AMD Radeon HD 6750M GPU, which adds significant heat. Modern 15” MacBook Pros dynamically switch between the low-powered Intel integrated GPU and the high-powered (and hot) AMD GPU as needed by applications, but the AMD GPU will always be used when an external monitor is connected — the Intel integrated GPU cannot output video over the Thunderbolt port in the 15”. (Oddly, it can in the 13” MacBook Pro and both MacBook Airs.)
It generates so much heat that it can’t be used in “clamshell mode” (closed, but with an external keyboard, mouse, and monitor attached), which has reduced airflow, without risking overheating, kernel panics, and possible long-term damage. I can’t see why Apple even enabled clamshell mode on it.
Some people report issues with the battery draining while playing a game. The 15” MacBook Pro comes with an 85W power adapter, but when stressing the CPU and GPU (such as when playing a game), the laptop draws about 93W — I don’t know enough about the electronics here to say for sure, but an insufficient power adapter capacity sounds like a plausible reason why the battery might drain under high computational load. If so, this is an embarrassing oversight by Apple.
The thermal paste seems to be very inconsistently applied, or there’s some other common manufacturing defect with the cooling system that varies per laptop. Many, many people reported having these issues and exchanging the laptop for a new one that shows far fewer issues. Many dedicated tinkerers have also reported success after reapplying the thermal compound between the CPU and heatsink, but that requires a very deep, warranty-voiding disassembly that I’m not comfortable doing. (I also haven’t owned thermal paste since 2001.)
Put simply, it sounds like the 2011 15” MacBook Pro has a lot of manufacturing inconsistencies and defects that result in improper cooling. But it also sounds like Apple wedged far too much power draw and heat into an enclosure that’s not designed to properly cool or power these demands. It’s not like Apple to release products like this.
But if I can get one working within my tolerances, it’s still the perfect computer for me right now. So I’m trying.
The attempted solution
Tonight, after requesting the return on my 2.3, I ordered a new, slower model that’s likely to run cooler with less fan noise. It’s the base-model 15”, but with an antiglare (matte) display added:
AMD Radeon HD 6490M: It’s manufactured on the same 40nm process as the 6750M, but has far less computational power, so I’m guessing this will result in much lower power consumption and heat.
2.0 GHz quad-core i7: This is the only CPU available with the 6490M. While I don’t expect it to be dramatically cooler-running than the 2.3 since it’s specced with the same 45W TDP, it does have a lower clock and lower Turbo Boost speeds, so I can probably expect an approximately proportional heat reduction.
So I’ll see what happens. I’m not sure what I’ll do if it doesn’t work out. This generation of 15” MacBook Pros has a lot of problems, and Apple really needs next year’s cooler-running Ivy Bridge processors as soon as possible.
http://www.marco.org/2011/09/20/heat-and-fan-issues-with-2011-15-inch-macbook-pr o

TS1713 Mac won't turn on.

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