Black Oval at Log In Screen

My Late 2009 iMac 27 Inch has been running fine. Earlier this year, I had the screen repaired/replaced by official Apple store under 5-year extended warranty because dust was accumulating in lines between the glass and the monitor. Now, several months after the repair (and warranty expired) I've been encountering a large black oval at the login screen. The startup screen comes up clear. But at login I get screen pixels, lines, and debris together with the large black oval. I can log in, but the screen issues continue making the computer unusuable. Also, after a few minutes, it will just abruptly shut down. I have started up from different disks to make sure it is not a software issue, and get the same result every time.
I've run the Apple Hardware Test from my original Apple CD-ROM, but it shows no hardware error.
I've attached a picture to show what is happening. My questions:
(1) Has anyone ever encountered this?
(2) Even though the iMac is now out of the extended 5-year warranty period, does Apple strill replace the display based on defect--I had read that the 2009 27-inch iMacs had many display problems.

I also have the Late 2009 27" iMac and this exact problem happened to me this evening. Never had any issues with it until now. I was browsing the web and my system froze. I could do nothing but restart with the power button. When I did my screen looks EXACTLY like your picture with the black oval and same other noise on the screen as you. I have yet to try any troubleshooting. I'm running Mavericks also.

Similar Messages

Black wallpaper on log-on screen after wakeup.

Apols, but I can't find anything realting to this elsewhere. Am still a newbie with macs (though I'm loving it!). Have set my wallpaper to the MAc pictures within OSX, but every time I wake my MBP from sleep, the bakcground is black - note this isn't a crash or "black screen" as I still get my log-on ID boxes etc. When I start up from turned off the Aurora background appears at log-in, so I don't know what's gon on with the wake up log-in screen... Anyone with any ideas?
Many thanks!

Have a look here "Topic : Desktop Wallpaper Issues" (http://discussions.info.apple.com/thread.jspa?threadID=2132964). Of particular note is if you have EarthDesk installed.
If nothing there works, may also want to look at "Topic : Desktop picture reset on startup (Missing com.apple.desktop.plist file)" (http://discussions.apple.com/thread.jspa?threadID=2482650&tstart=2).
Hope this helps.
Message was edited by: aprouser

IMac screen issues-turns black then to log-in screen

I own a late 2102 iMac, 21.5 inch. 2.9GHz Intel Core i5 with 8GB memory. Storage=1 Terabyte. Running Yosemite 10.10.1. Several times in the past two months while I am using my iMac, my screen has become very bright, then suddenly switches to a black screen with just the cursor showing. It then switches to the user login screen. Today I was just syncing my iPhone 5S to iTunes. Nothing radical. In the past, I was using Word or sending an iMessage. Instead of logging back on as the same user, I opted to restart. When I restarted, iTunes opened back up as did PowerPoint, which was random since I hadn't been using PowerPoint nor was it even open in the Dock. I have restarted the iMac on several occasions using Command-R and ran Disk Utilities with no problems showing up. Has anyone else experienced the same or similar problem? Is it a Yosemite problem or a hardware problem? Any solutions?

1) You need to Find the crack on Sim 3 game on Google and Copy and replace the File with new crack and problem will get solved.
Try downclocking your >>GPU<<
try lowering it more and keep testing with each one. If you have another power supply test with that(but its HIGHLY unlikely that its your psu). But overclocked cards demand more power as far as i know and it might be getting tough for the psu to handle.
And is the space freeing up on only c drive? It happens all the time. temp files getting deleted and all that. but virus scan and chkdsk wouldnt hurt..................
Take pleasure in knowing that your problem is nothing compared to what most people i stated above are facing. they cant for more than ten minutes. your crash occurred only watch serials once and a after a long time right? see if it happens again. it might get more frequent in which case you problem is very .....problematic.

Random black screen after log in screen

I have a week old top spec rMBP, I migrated my settings from my older MBP using migration assistant without any issues, my problem is random which makes it difficult to describe, when I reach the log in screen and insert my password click enter, sometimes the computer opens normally and at other times I get a brief flash of white which looks like a horizontal line but it is very rapid so I may be wrong, and then the screen goes black and nothing happens, no menues or options, all I have is the power button to shut down. I restart and it can take a variable number of attempts before it will get beyond the log in screen, 6 attempts it the most so far !
I have an appointment at the Apple store tomorrow but just wanted to know if there was something I was doing wrong to save the journey, the machine works fine once up and running, I have done the disk and permissions repair via disk utility but it does not seem to make an difference, there used to be some resets using various key combinations and there was the remove the battery reset option but of course that is no possible now.

You could try two things (but I doubt that either will work).
Reset PRAM and NVRAM.
Reset the SMC.
Give them a try as last resort. As I said, I doubt that either will fix your problem, but it's worth trying.
Clinton

Problem with sleep & log in screen - log in disappears & screen goes black

System: Mid 2009 MBPro 15". 4GB memory. 59.98 GB of 500 GB free. 10.7.2. External devices: Time Capsule, but not all the time.
My MacBook Pro has been developing this issue over the last several weeks. It is happening more and more frequently and I am afraid I may lose everything.
Another poster had a similar problem, which I have excerpted to save time (and he described it very well):
Scenario: Plugged into a power adapter, I close the lid of the machine to put it to sleep. When I open the lid to log back in, the screen comes up for approximately 4-5 seconds, then goes black. I cannot type fast enough to get logged in before it goes black. In fact, it seems to go black faster when I try to type.
If I close the lid while on battery power, everything works normally - although a couple of times today, it happened exactly as described above.
In addition, with the machine plugged in, I can close the lid, open it, wait for the screen to go black, UNPLUG it, and the screen comes back like nothing is weird. - again, this pretty much stopped working this afternoon.
I also noticed that when plugged in and the screen goes black, the white standby light never starts "breathing." When on battery power, however, it starts "breathing" normally.
Please help. My entire life (and career!) is on this machine.

It is not easy to say why this happen. In your last posting you wrote about some windows updates. Who knows what is wrong there.
If nothing helps, not even system restore and you want to use stand-by mode I recommend you to back-up all your data and install OS again using recovery mode.
With factory settings everything will be OK again but then be careful with updates.

Mbp fall asleep, log in screen black

when i leave my mbp for a few minutes and return to try and log in the screen is black. when i move the mouse around it removes some of the black to show portions of the log in screen. what is going on here?! i have a late 2010 macbook pro 13 inch.

I had a simular issue with my IMac. Apple replaced Logic Board & Graphics Card. When they repaired, still had same problem. I went into System Preferences, Security & Privacy, General Tab, and I unchecked the log out after ** Minutes of inactivity.
That stopped the screen from freezing up.

Help!! I changed my log in screen to show a blank name and pw. Now I cannot open the computer???

Help!! I changed my log in screen to show a blank name and pw. Now I cannot open the computer???

1.Turn on the computer and when you hear the startup chime hold CMD+S. This boots the computer into single-user mode, giving you root access.
2.Once single-user mode loads (it looks like a black screen with white text) mount the hard drive. So at the prompt type in:
/sbin/mount -uw /
3. Now that the drive is mounted we can edit the file system. We need to delete a file that tells your computer that you have completed setup. So type in:
rm /var/db/.applesetupdone
4.We need the system to reboot so it can check for the file and not find it. Type in:
reboot
5.Continue setup
Be sure to select “DO NOT TRANSFER MY DATA”.
6.Finish setup and login.
7. Go to system preferences and edit that account so it HAS A NAME.

MacBook frozen at log in screen.

My MacBook Pro is frozen at the log in screen. When I leave it for a while the screen goes black and it i can get it back on again. I have restarted it manually several times tried to charge it and researched online. Any suggestions?

Follow HT3964
Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
Try to power it down by holding the power button until it shuts down. What are you seeing on the login screen btw?

X220 log-in screen changed to Windows 7

My X220 laptop arrived two days ago and the log-in screen (before going to the desktop) changed from a black background with the word THINK to the regular Windows 7 background.
In the two days that I have had my computer, I was loving the black background with the word THINK everytime I signed into my computer. I just wish I had it back. Is there any way to get this screen back?
Solved!
Go to Solution.

Yup I did change to a Windows theme, and that was what caused my log-in screen to change. Thank you for that. All is good now. I reverted back to the default theme, and changed it's background to my liking.
krzysiuc wrote:
Probably you changed your Windows theme. One option would be to change it back to Thinkpad theme. Otherwise you might follow this article:
http://www.winhelponline.com/blog/windows-7-lets-you-change-the-logon-background-image/

I cannot log onto sites that require my log in and password. I get no error message, fire fox just goes back to the same empty log in screen. this problem is not limited to one site. I reloaded firefox with same results.

When i type in my log in and password and enter, the site either returns to the blank screens or does nothing. This is not limited to one or two sites. all of my financial institutions, electric company, insurance companies, even trying to register here so that i could ask this questions. In this situation, when i hit the register button, nothing happend, its as iff the button is inactive. i had to go to IE to register and post this question. I just tried to enter my new log in and pw on the screen in fire fox and nothing happens. Some sites behave differently when i hit the submit or log in button. the information seems to be transmitted but the screen comes right back to the original log in screen with blank fields. there are no error instructions that something does not match or is missing. then i go to IE and it works.
This started a few weeks ago. I cant identify anything that was added around that time but i tried a system restore and that did nothing. i deleted fire fox and downloaded the latest version 3.6.13 and it is still happening

This issue can be caused by corrupted cookies.
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
* Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
* Tools > Options > Privacy > Cookies: "Show Cookies"
*http://kb.mozillazine.org/Cookies

Macbook Pro unable to get pass the Log in Screen.

Hey hope someone can help.
Okay so last night I was using Windows, I shut down, then a few hours later I switched it on to go onto my Mac, but it took forever, I left it though and eventually I got to the log in screen, I entered my password and it was loading then the screen went blue/gray (not sure I think both) and went back into the log in screen again... I did this numerous times before giving up and shutting down. Went to sleep, woke up and resumed this...so I decided to see if I could log into my windows, which it did just fine, I'm on windows typing this right now.
I have run the apple hardware test, extended too, and I have recieved the error code: 4SNS/1/40000000:Th2H-63.000 (No idea what that is)
I have also tried booting from my start up disk that came with my Mac. It gives me the Apple logo on the gray screen then ejects my disc, gives me this long story... kind of goes: panic (cpu 0 caller 0x00431da3):"unable to blah blah... Tells me to restart or shutdown.
I looked at my disc and I think its cracked, So I have to get that replaced.
I think I have to archive and install, I really don't want to lose my music, as I haven't backed it up. 400 songs or so nothing much, I'm not worried about the other stuff as that is all backed up.
Long story short can someone tell me what's going on with my Mac? why am I still able to use windows fine? Has windows done a hit on Mac OS? lol. Is the solution to replace my install disc at Apple? I really don't know, any help would be greatly appreciated thanks, I'm just too tired and can't Google anymore :P
(I have a small partion of 32GB dedicated to Windows Vista.)

"I have run the apple hardware test, extended too, and I have recieved the error code: 4SNS/1/40000000:Th2H-63.000 (No idea what that is)"
Neither do I. Suggest that you take your MBP to an Apple Store or an AASP.
"Is the solution to replace my install disc at Apple?"
Yes. You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support for a nominal S&H fee. *You'll need to have the model and/or serial number of your Mac available.*
Since you're not in the US, you may need to go through the regional Apple Store that serves your location to find the contact number. Here's a list of links to all of those -
http://store.apple.com/Catalog/US/Images/intlstoreroutingpage.html
!http://i50.tinypic.com/izvwo1.gif!

I have enlarged icons on the log in screen and can not enter my login code. I have tried enough times that I am locked out and my iphone 5 has been disabled.How do I fix this??

I have enlarged icons on the log in screen and can not enter my login code. I have tried enough times that I am locked out and my iphone 5 has been disabled.How do I fix this??

Hey there byambar,
Welcome to Apple Support Communities.
It sounds like you’re describing two issues, the first issue is related to the Zoom accessibility feature and the second issue is related to the device being disabled.
Take a look at the article linked below to learn more about Zoom and the other accessibility features on your iPhone 5.
Use Accessibility features in iOS - Apple Support
This article will help you resolve the issue with your iPhone being disabled.
Forgot passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support
Take care,
-Jason

On a online game.when i log in thats ok.when i want a location in the game.it goes back to the log in screen again

when i log in to this web site it opens the game screen. when i then want to go to a different location in the game. it resets back to log in screen again.
but it works ok on all other sites.
== URL of affected sites ==
http://s3.travian.co.uk/dorf1.php

"Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

On my Mac Book Air when I open it up the Log In Screen is there but I cannot log in because the rainbow spinning ball is permamently there. How do I get rid of it so I can log in?

On my ac Book Air I have opened it up and te Log In screen is showing but so is the Spinning Rainbow Ball which willl not go away. How do I get rid of it so that I can log in?

Hello cdcamp,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Mac OS X: What is Safe Boot, Safe Mode?
http://support.apple.com/kb/ht1564
To perform a Safe Boot, press and hold the Shift key immediately after your Mac starts up.
Best of luck,
Mario

Wife's Mac Book Pro locked up will not allow her to log on, it froze up on her so she did a hard shut down by holding power button until it shut down. Will power up but not allow her to log in on the log in screen. Any suggestions?

Wife's Mac Book Pro locked up. She shut it down by holding power button unitl it shut down, when she powers it up now it will not allow her to log in on the log in screen. Any suggestions?

Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Black Oval at Log In Screen

Similar Messages

Maybe you are looking for