Screen corrupts on going to sleep

Running OSX Lion (freshly reinstalled ), have family of 4 users on one iMac 21.5 (2010 model).
Only started 2 months ago, on returning to the iMac when it has gone to sleep the screen has frozen on the last image accessed. Waving the mouse over screen reveals the login screen below (removing it large pixel by large pixel) allowing us to login.
Have tried turning off screen savers for everyone, but hasnt worked.
Any ideas anyone

At the bottom of your thing it says you are using 10.7.1. Is this correct? If so, run Software Update first, and see where that takes ya. From there, if you are still having issues with the black screen, try opening Disk Utility, and hit Verify Disk. If this comes up with errors, re-start your computer holding the Option button down, from there, select Recovery Disk as your start up disk. You will be able to locate Disk Utility in there, and you can Repair Disk from there.
If it does repair disk successfully, that could be part of the problem. If that doesn't work, follow the steps in this article to reset PRAM/NVRAM http://support.apple.com/kb/ht1379
Even still, if that doesn't seem to correct the problem, i would back up everything on your computer to an external harddrive, erase, and re-install 10.6, run Software Update a few times, check the app store for the digital download of Lion....you should not need to "buy" this again, it should see it in the purchased section..
Update again with Software Update when you get the successful re-installation of Lion. I'm not 100% positive with the whole re-installation steps, if it walks you through going through the Migration Assistant or not, but even if it doesn't, that's okay. You can still locate Migration Assistant via the Utilities folder and bring back all your Time Machine stuff again.
Still if you want to dig even deeper to see if there is a problem with your hardware, you can run Apple Hardware Test. Check this article for steps...http://support.apple.com/kb/HT1509

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What makes my screen change after going to sleep?

I have os10.9.2 and since I installed it 6 weeks ago my screen changes sizes after it wakes up. I have a mac mini.

At the bottom of your thing it says you are using 10.7.1. Is this correct? If so, run Software Update first, and see where that takes ya. From there, if you are still having issues with the black screen, try opening Disk Utility, and hit Verify Disk. If this comes up with errors, re-start your computer holding the Option button down, from there, select Recovery Disk as your start up disk. You will be able to locate Disk Utility in there, and you can Repair Disk from there.
If it does repair disk successfully, that could be part of the problem. If that doesn't work, follow the steps in this article to reset PRAM/NVRAM http://support.apple.com/kb/ht1379
Even still, if that doesn't seem to correct the problem, i would back up everything on your computer to an external harddrive, erase, and re-install 10.6, run Software Update a few times, check the app store for the digital download of Lion....you should not need to "buy" this again, it should see it in the purchased section..
Update again with Software Update when you get the successful re-installation of Lion. I'm not 100% positive with the whole re-installation steps, if it walks you through going through the Migration Assistant or not, but even if it doesn't, that's okay. You can still locate Migration Assistant via the Utilities folder and bring back all your Time Machine stuff again.
Still if you want to dig even deeper to see if there is a problem with your hardware, you can run Apple Hardware Test. Check this article for steps...http://support.apple.com/kb/HT1509

Screen corrupted after wake from sleep

My screen on my 2 week old iMac comes up pixelated leaving square trails mimicking the movement of the mouse. I have had consultations twice with Apple support junior team members, looking forward to a senior team member reviewing my case. It looks like some sort of eraser wiping the blank dark screen revealing the login screen underneath. Any ideas?
Oh by the way my first iMac was sent back due to dead pixels, how unusual is that?

I'm having the same issue with my 13" MacBook Pro. I restored it and the issue is still there, albiet very intermittent.
Here's a picture of my MacBook experiencing the issue (note the trails caused by moving the cursor around):

Grey Screen while running a dvd/Sleep Mode

Hello everyone,
I have a Mac pro G5 PowerPC running leopard. I recently just did the apple updates on my computer and ever since then when I have a dvd in my computer after awhile I get the grey screen saying that I need to restart my computer. This has happened about 10 times since I did the update a few days ago. When it reboots I get the message saying that my OS X had stopped responding. I go to send the apple report and take a look at what it is sending and it is something about a kernal. I had a co worker recently say that his computer was doing the same thing with the grey screen when it goes into sleep mode. Is this a known issue at the moment?
When I come home from work and hear my fan running I turn on my monitor and have the grey screen. I thought it was my computer going into sleep mode that was giving me the error however when I rebooted and started my computer a couple hours later. In the middle of watching a dvd I suddenly got the grey screen. The same thing happened while watching a movie last night.
About 2 months ago I bought a new hard drive for my computer and used a program called SuperDuper to make an exact copy of my hard drive onto this new one. I then swapped the new hard drive in my computer. It has been running fine until I just installed the OSX updates.
I don't know if it is coincidence that when I am running a dvd that the grey screen appears since I have done the updates or that doing the OSX update has somehow made my OSX go bonkers.
Also is it possible since I installed the OSX on this new hard drive via this program and not from a disc that is the possible reason when I did updates that my computer's osx freaks out. If so why does it wait about an hour or so of being used to suddenly stop working?....
My other thought could be that my dvd drive is going bad and needs replacing and why would that make my OSX crash?.... if that is the case what dvd drive should I buy and install?
Sorry I don't know much about computers and all this stuff but these are just some of the things I thought might be happening and I just don't know enough about computer to say "yes that is why this would be happening"
Thank you everyone,
I look forward to your responses

Hi bessera;
You are suffering from kernel panics. These are generally caused by a hardware problem, most of the time bad RAM. I would suggest use the install media for you Mac and running Apple Hardware Test using the direction written on the DVD.
Allan

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Well, sounds fairly normal or typical behavior for the iPhone. The display is designed to go sleep when not in direct use, ie being touched; the interval for going to sleep is adjustable in Settings. And during a phone call, say with the phone up to your ear, there is no touch upon the screen, so it goes to sleep. It does take a few seconds, though it seems to me it's only like 2-3 secs, for the screen to re-appear so one can click the End Call button. Ditto for checking messages or email, particularly if the email is updating and there is no touch on the screen.

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I've got a 2011, 21.5" iMac. I've had a few screen problems with it, and it's had two replacements now.
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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
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A small idea, please check whether it will work or not.
You can achieve this by using combination of DNS server and reverse proxy server.( Customized apache). Make 'A' record for www.abcd.com to reverse proxy server IP address in your DNS.
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Configure appche to accept incoming request for www.abcd.com and points towards www.abcd.com/parameters.
I think this will solve your problem. Only one condition is that proxy server will communicate with www.abcd.com on behalf of client.
Follow the link for configuration of reverse proxy server
http://www.slashroot.in/how-configure-basic-apache-reverse-proxy
HTH
Naisam

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Howdy all,
I have a new Intel 24" iMac, less than 3 days out of the box. Almost every time the computer goes to sleep (except twice so far when I first started using the machine) the screen goes dark for a few seconds, then turns light blue and freezes. Neither mouse movement or keyboard input will wake it up, and I have to do a hard reboot. This happens if I put the computer to sleep or just let it happen per the Energy Saver timed settings. Hardware test shows no errors. Screen saver has been disabled. All other settings and software was imported using the setup assistant from my previous iMag G5 running OX 10.3. Tried contacting automated Apple support (newly-reduced live tech support hours are NOT an improvement) and have come up empty. Any suggestions?
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Howdy all,
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Screen corrupts on going to sleep

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