My iMac won't wake-up from a black screen...

At random times, more and more often, now, I return to my iMac (Lion) to find it with a black screen. It will not respond to clicks of a mouse, keys on the keyboard, or pressing the power button. I do not have 'hibernate' feature enabled. I leave it at night and the display dims and blanks out after ten minutes. I hit 'esc' in the morning and it pops right up for me, and is fully functional. But when I leave my computer for ten or fifteen minutes during the day, I return to that mysterious non-responsive black screen.
I don't know what to do to eliminate this problem. Is it software? Is it hardware? Is it the operating system? Do I need an appt with the Genius Bar? My computer is only nine months-old.
Help!

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My imac won't wake up from sleep

My iMac is about 6 months old and if it goes to sleep it won't wake up.
The screen is dark, I press on the space bar, click the mouse but nothing happens. (at least on the old iMacs there was a light to see whether it was on or not).
Then I have to hold the start button in for 15 seconds, let go, and then hold it in briefly and it restarts.
I'm running Lion. I have the screen saver set to 5 minutes and the energy saver 1) computer sleep and 2) display sleep both for 10 minutes

I'm having this same issue. Try this advice
http://www.maclife.com/article/howtos/how_fix_mac_won%E2%80%99t_wake

IMac won't wake up from sleep

When my iMac goes to sleep, pressing any key on the keyboard, or moving the mouse will not wake it up. I've tried resetting the SMC (System Management Controller), as suggested in one the Tech Support articles but to no avail. I have to shut it down by holding the Power Button, the turn it back on again, every time it goes to sleep. Any suggestions?
iMac 20'' Intel '06 Mac OS X (10.4.10)

Ok, while you check the software check the firmware version you have, this doc will help
http://docs.info.apple.com/article.html?artnum=303880
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My iMac won't wake up from sleep, and often refuses to boot

Hey guys,
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My iMac won't wake up after sleep or screen saver.

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Please detail ALL you have done so far in the way of troubleshooting? Need this info to avoid the been there done that scenarios.
Have you read for possible solutions over in the "More Like This" thread over here?----------------------->
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Hi 02SilverSport,
Try using the power button to wake the iMac.
OS X Mavericks: Using the power button
http://support.apple.com/kb/HT5869
If you are using a wireless keyboard or mouse, check out this article:
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http://support.apple.com/kb/PH13997
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http://support.apple.com/kb/TS5357
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Won't wake up from sleep mode

I have only had my iMac for a couple weeks and four times now it won't wake up from sleep mode. I have to use the on/off button for a response.

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My iMac will not wake up from sleep after upgrading to OS X Mavericks

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Hi...so finally got my X1C today. One thing I am noticing is that the machine won't wake up from sleep mode when I press any key on the keyboard -- it only wake up by pressing the power key. This is a bit unexpected to me. Is it by design, and is there any way to change this?
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Solved!
Go to Solution.

Does it awaken from stand-by if you press the Fn key? That's been the ThinkPad standard for as long as I can remember.
Regards.
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MacBook screen goes gray and won't wake up from sleep - 10.6.2

We have a MacBook Alum running 10.6.2 with 4gb ram.
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Hi GrooveDaddy,
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What if you manually sleep the machine by closing the lid or engaging it via software (via the Apple menu) does the screen have the issue in both scenarios?

Imac won't play songs from my iPhone after I have authorised the computer

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G3 Bronze Keyboard won't wake up from sleep

I have a hand-me-down Powerbook G3 Lombard 400 Mhz (bronze keyboard), with a dead main battery. It works great with the power adapter, and has just enough charge for me to move it from one outlet to another without shutting down. I'm trying to set it up for use as an Itunes server connected to my home stereo, which is fine because it will always be plugged in.
The problem is that the laptop won't wake up from sleep. This morning I noticed that the display and HD seemed to be sleeping, but the fan/processor buzzing noise was still going (there were no lights other than the little green light on my PCI card). I couldn't figure out any combination of keyboard or power key strokes that would either wake it up or shut it down. I unplugged it, waited half an hour or so, and it finally shut down. I then plugged in, hit power, and it started and booted perfectly (after the expected disk check for abnormal shutdown). Then this afternoon, the whole thing was sleeping (I think -- no sound, no lights other than PCI card light), and again it wouldn't wake up. Again, I unplugged, let it power down (waited for the PCI light do die), the replugged and it started up just fine.
Any idea what gives? Or what I do when it's sleeping? Right now, I have changed the power saving settings so that it never goes to sleep, but I'd really like to let it sleep when people forgot to turn it off...
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aldpol,
There are many causes for sleep issues and you just have to wade through them one at a time.
You can always force a Lombard or newer powerbook to shut down by pressing/holding the power button until it turns off. As you have noted, this is an undesirable process since you can corrupt the HD.
I would start the troubleshooting in this manner:
1. Unplug all peripherals (PC cards, mouse, everything).
2. Reset the power manager:
http://support.apple.com/kb/HT1431?viewlocale=en_US
3. Now put the powerbook to sleep via the Special menu, wait a minute or so, then wake.
4. If no success, restart while pressing the shift key until you see the message 'extensions off', then release. Now test sleep/wake.
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My mac won't wake up from a sleep and I have to unplug it to reboot as the power button doesn't function as well. Any suggestions? Running Lion 10.7.4 and sending all reports in.

My mac won't wake up from a sleep and I have to unplug it to reboot as the power button doesn't function as well. Any suggestions? Running Lion 10.7.4 and sending all reports in to Apple.

First things first:
Update your profile (equipent, OSX, etc)
In Lion MS office2004 is not compatible, are you stIll using it?
Do the SMC RESET and do the PRAM reset.

M70-160: won't wake up from hibernate or standby - software or hardware?

I just got maaaaaan!!
works fine, but won't wake up from hibernate or standbye !! unless yur gonna wait for awhile!! 15min or something like that!!
After that it will wake and work normally !
I thought it's overheating problem but now just power it on and when the toshiba logo appear if you turn it off, it won't power on again, but after 15min it WILL !!!
so it's not a heating problem !!
It does that even without HD on it !!
at first it was hibernate and standby problem, now it dose the same with shutdown !!
what can I do!!
i just bought it guys !! ASP is to far a way !!
is there anyway i can do to fix it !!
i do fix PCs alot but not notebooks !!

thank you for your help and the fast replay, i really really appreciate it.
I'll explain the problem in details, right after hibernate or standby IF you press power button the led goes blue, fan starts, HD led lights, battery led, power adapter led (if its connected), and cd player make sound as if it looking for a CD, and THEN fan stopped, HD led goes off, no sound of CD, leaves u only with power button led ON, a nice frustrating Blue
after waiting, u eventually gave up, turn it off by along press on power button, and then no matter wut u do, simply won't start only same sounds and leds as mentioned previously, nothing on the screen as if its dead !! no logo no nothing.
give it a time ( about 15min with battery connected, or 5min or less with battery out) Press the power Button, THERE U GO, works perfectly !!
same case with shutdown but not always as hibernate and standby (though once it did wakeup from standby!!), but most of the time after shutdown u have to wait 15min!!
no USB flash memory connected or anything else !
i did install winXP pro SP2 on it and installed the drivers and Microsoft HOT fixes also, but problem remains.
i also did recovery from the recovery CD that comes with it, also no good !!
i noticed that if u disconnected the battery the unit needs shorter time to be able to wake up or boot. about 5 min.
wut kills me is that the unit works perfectly and i like it !!! i only got this issue with it !!
so wut i need to know is this: Is there anyway to make sure weather if its a software problem or a hardware problem?
its not easy to go to the local service cuz its in another city!! i need to try first wutever it takes to fix it on my own!
thank you for your time!

My iMac won't wake-up from a black screen...

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