2008 iMac, display not coming back after sleep, requiring SMC reset and more.

I have a 24" 2008 iMac that's recently started giving me migranes starting a couple weeks ago. It's the kids' shared computer in the bonus room, and one of them comes in and tells me it's not working. I go in, and it seems like it's off, but I can hear the fans going. Won't respond to mouse, keyboard, even hitting the power button that usually pops something up warning that I'm about to shut it down with people still logged in. So I hold the power button down to force it off, wait a minute, and turn it back on. I hear the superdrive sounding like it's trying to load a disc, but there's nothing in there . . . keeps making that noise again and again. No startup chime, no display, nothing, just the superdrive sound. Can't get it to boot. I come to the support site and go through resetting the SMC - unplugging it for 15 seconds. That at least takes care of the superdrive sound, and I get the startup chime, but no video.
I go a step further, unplugging it and plugging it back in while holding the power button down for 10 sec. When I hit the power button after that, it comes on, display nice and bright, but the fans are now running full speed. Another article tells me to reset the SMC for that, which I do, and now the fans are working properly and the system is working again.
Problem is, I wind up having to go through this whole thing every other day. If I follow the steps of unplugging it, holding the power button down while I plug it back in, turning it on and booting up, shutting down and resetting the SMC to make the fans slow down, it will work. But it's random as to when it happens, and I'd really like to know why it could be happening and what I can do to fix it for good and not have to go through the whole thing to get it back up and running. Is it simply on its last legs? Do I need to restore the OS (Snow Leopard upgrade)? Do I need to take it to the Genius Bar and pay them to look at it and diagnose it, and God knows how much to fix?
Or, do I recycle it and just bite the bullet and get a new one? Any thoughts would be greatly appreciated, thanks!
Andy

the first thing to try is resetting the pram/nvram
http://support.apple.com/kb/ht1379
if this doesnt work it could be a loose display cable.

Similar Messages

IMac Display not turning on after sleeping for a while

Hey Guys,
Minor issue I've had with my iMac for the last few days, when I wake up I tend to nudge the mouse to turn on the display before taking a shower so that everything is ready for when I get back. However the screen isnt coming on and I'm having to press the power button to sleep the iMac then wake it up again by pressing the power button 5 seconds later, after that, all is good.
Any ideas? This has been since upgrading to 10.6.4
Thanks

Yeah I might think it's overheating too, but the harddrive always makes this strange noise before the crash happens, so it could be related to the hdd? Or in the worst case, the motherboard.
Any tips on how to check for overheating? I have tried to run temperature monitor software, but the only sensor it detects is the hdd, and it looks fine.
I haven't opened my iMac fully ever, just the user serviceable parts. I installed an Airport card about 1 month before this started happening, could this be related?
Pierre, what did you do when your iMac started overheating? How did you fix it? Mine just full crashes and the screen goes weird. Thanks for your answer.

Display not coming on after sleep

Alright so ive looked for awhile and found this is pretty common, except all ive found talks about either imacs or macbook pro. I have an early 2008 model macbook with snow leopard. This has been happening for quite a long time, even before installing snow leopard. If the computer goes to sleep either from time lapsing, or mostly how it happens, from closing it, most of the time i cannot get the display back on until i restart by holding the power button down. Everything ive seen on here so far, nobody has an answer, so does anybody know how to fix this problem yet?

the first thing to try is resetting the pram/nvram
http://support.apple.com/kb/ht1379
if this doesnt work it could be a loose display cable.

MBP C2D -- display not coming on after sleep, hd is spinning, hard reset re

HI,
After using my new Macbook Pro Core 2 Duo 2.33 for a few days, randomly after opening the lid while Macbook has been sleeping the display will not come on, no illumination whatsoever. The hard drive is spinning.
The only recourse I have found so far is to do a hard shutdown by holding the power button.
any known solutions?
MBP C2D 2.33 Mac OS X (10.4.8)

No, my laptop is treated like a desktop replacement, so it doesn't move. And no peripherals connected.
Hope Apple has corrected the logic board problem by now, though anything is possible as my Macbook is the first production run of the Core 2 Duo.
Will try booting from install disk and repair permissions. Hopefully this is it. (Migration Utility failed miserably when i tried to copy over my user files from my old Powerbook 800. While it said it was doing the copy of my documents etc., it failed to copy any of them across. Migration Assistant even said it was successful.)
Thank you

HT1338 Mac mini display connection will not come back after sleep, I have to shut down and restart the monitor.

Mac mini display connection will not come back after sleep, I have to shut down and restart the monitor.

Finder icon on dock, macintosh hd, library, launch agent - delete all files & restart sleep to test
also
Finder icon on dock, macintosh hd,
Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
delete file & restart sleep to test.

MBP not coming back from Sleep in Retina MBP

Hi. I've recently bought a new Macbook Pro. Everything is working great except one problem with the Sleep.
Sometimes, when I try to wake up the Mac from sleep, everything stays black and I have to turn it off. I've been able to reproduce this by doing the following:
1) Connect the MBP to power and put it to sleep by closing the lid.
2) Disconnect the power while asleep
3) Open the lid.
Does anybody know if this is Software or Hardware?
Thanks and regards,
Gonto

Check out the article: Intel-based Macs: Resetting the System Management Controller (SMC)

Monitor not coming back after suspend

I have an i686 installation and I'm running enlightenment (e16) on it.
I have modified /etc/acpi/handler.sh to contain:
case "$1" in
button/power)
case "$2" in
PWRF) /usr/sbin/pm-suspend ;;
and used visudo to give my user permission to run pm-suspend.
It sleeps fine with either the hal method or the pm-suspend method.
When I hit the power button the computer wakes up but the monitor doesn't come back ever.
I created /etc/pm/sleep.d/02hal as discussed in
http://wiki.archlinux.org/index.php/Pm- … _on_resume
but that didn't help.
Does anyone know a fix? Thank you.
Last edited by kekules_dream (2010-09-06 21:00:07)

I installed kernal26-lts and the monitor comes back on now after a suspend. I guess some how there was a regression in the kernel.

L755 Backlight not coming on after sleeping

We got a new L755 laptop and seince we got it, its doing a strange thing. When the computer wakes from sleeping, the backlight doesnt come on, but when the computer powers on from being off, it works perfectly. A little googling hasent turned up anyone else with this problem, so does anyone have an ideas/soloutions?
Thanks in advance!

I would make sure your using the latest BIOS; that would be the first place I would check.
========================================================
QOSMIO - x505 q8102X
i7-2630QM , GTX 460m , 18.4" screen @ 1680x945p

E550 will not come back after hibernation/sleeping mode

Thinkpad E550 will not come back after hibernation/sleeping mode. please help. I just bought this garbage laptop about 1 month ago. the big issue is the laptop will not come back after sleeping. I often run some calculation for some hours, the laptop always goes sleeping and wont come back. I had to power off the laptop and re-started it again. All of my calculation results were gone. Lenovo support is very bad, I already submitted a service ticket 2 weeks ago, but nobody contacted me. Lenovo laptops are garbage. I will not buy it anymore. Anyone can help? thanks a lot!

HI Clare,
In the Toshiba Power Management utility you should click on the 'advanced' tab and about half way down the resultant window you should see an option for the action to be taken when you close the lid of your SA30.
Make sure that this is set to 'hibernate'. Then go to the power save modes and click on the 'details' tab and then the 'Power Save Mode' tab and make sure that the 'Hibernate' option is set to 'never'.
With these settings your notebook should go into 'hibernate' when you close the lid but not at any other time.
Note that you can set the notebook to hibernate when running on battery when the bttery capacity reaches a pre-set value of your own choosing.
regards,

Satellite P850-30W - Fan does not run after coming back from sleep mode

I got a Toshiba Satellite P850-30W with bios 1.90.
Sometimes the fan does not run at all after coming back from sleep mode on windows 7.
This has happened twice (maybe more times without me knowing), and Ive had the computers for a month.
Normally the fan starts running when the CPU gets over 50 celsius, and stops under 50 celisus...
I tried running Prime95 when this fan-issue occured and the computer temps got dangerously high (close to 100 degree)! the fan did not start at all
...this error could potentinally damage the laptop...
to get the fan running again I have to restart windows
anyone else experienced this?
I guess the fix would be to never use sleep-mode...or toshiba needs to fix it with a bios update.

What kind of answer do you expect here in user community?
Exact info about the fault? I dont think that somebody would be able to provide exact answer but just speculations
In other Forum you can read about Satellite notebook; but is it exacts the same model?
No, it seems to be an L650 series. Its completely different series .
From my opinion its not software related problem.
BIOS issue?
Well, in case it would be a BIOS issue, the problem would appear always and not sometimes after being shut down 200 times.
It could be a hardware related issue. Memory? Maybe
In my personal opinion to get more details hardware diagnostic software should be used in order check the hardware for possible malfunction. Thats my personal opinion

IMac screen will not come on after sleep

iMac screen does not come on after sleeping for a period of time - twice now from overnight. The back seems to be warm. I have to hold the on button until I hear the drive and system shut down. Then after period of time it will start just fine. ?????

I know that some of the older imacs had overheating problems that caused unexpected sleep. try to keep the display darker and keep the room not too hot. That seems to usually solve the issue.

After upgrading to 10.6.6, major problems coming back from sleep mode

I updated my macbook from 10.6.5 to 10.6.6 and now it is unresponsive frequently after coming back from sleep. The computer stops responding and I have the spinning beach ball on the screen forever. I couldn´t find any correlation with the programs I am running.
I used Onyx to clear all caches, rebooted, etc but nothing seems to help...

I have the same issue, I've found though that it seems to happen only if i goto sleep mode after logging out of my mid-2010 MBP. As long as I remain logged in and put the MBP to sleep it does not lock up with the spinning beach ball.
This lock seems to happen just as I click on my name to login after waking my MBP from sleep.
I have no peripherals, except maybe the power adapter, but it seems to happen regardless of if the power adapter is plugged in. I've done repair permissions in safe mode as well as disk scans.

My ipad screen is black and will not reset and does not come back after restoring, the info is still on internal because i can see it on itunes in the apps catagory it's the display is not working, can see backlight but black...does anyone know how to fix

my ipad screen is black and will not reset and does not come back after restoring, the info is still on internal because i can see it on itunes in the apps catagory it's the display is not working, can see backlight but black...does anyone know how to fix, other than take it to apple.
thanks!

The wish list only works on apps you have to pay for. To get it tap the icon of the app you want to save. After it opens at the upper right corner is a box with a arrow. Tap that then tap add to wish list list in the box that opens.

When i put my Mac for sleep it takes more time than normal ( 20 secs). Sometimes, coming back from sleep the system is not responding (freeze).

When i put my Mac for sleep it takes more time than normal (>20 secs). Sometimes, coming back from sleep the system is not responding (freeze).

Perform SMC and NVRAM resets:
http://support.apple.com/en-us/HT201295
http://support.apple.com/en-us/HT204063
The try a safe boot:
http://support.apple.com/en-us/HT201262
Any change?
Ciao.

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

After upgrading to OS X, my iMac will not wake up from sleep. Each time I have to do a hard restart. Is there a fix for this problem?

Hi,
I have just had the same problem with my iMac and after upgrading to Mavericks my iMac would not wake without pressing the power off button and re-booting.
Anyway, I have since done a complete new install on my iMac and have gone 5 days without an issue with the iMac not waking. It was a bit of a pain to do but my own view so far is that the problem is linked to the upgrading of the OS instead of a clean install.
My iMac now flies with a new OS installed instead of an upgrade.

2008 iMac, display not coming back after sleep, requiring SMC reset and more.

Similar Messages

Maybe you are looking for