What causes ghosting on an iMac screen (27")?

What causes ghosting on an iMac screen (27")?
The ghosting on my computer is not uniform; it becomes darker toward the bottom of the screen and is more prominent on the left side.

That's just because of a defective LCD panel (it has nothing to do with your graphic card). A lot of Macs have got that problem, and unfortunately, the only solution to that is to take the Mac to an Apple Store or reseller to get your display replaced

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What does mean when a imac screen goes all white

what does mean when a imac screen goes all white

Hopefully its not the logic board. try a PRAM reset: http://support.apple.com/kb/HT1379
basically hold cmd, option, P, and R directly after start. Keep holding them down until you hear two chimes. That indicates a successful PRAM reset. It is not uncommon to hear 3.
If that doesnt work try an SMC reset. Pull out the power cord from the back of the mac for atleast 15 seconds. plug it in again for 5 seconds and power back on ...http://support.apple.com/kb/HT3964
Regards,
Cody

Would like to record what's on my 24" iMac screen. How?

I would like to record video of exactly what's appearing on my 2008, 24" iMac screen. I would like to have the video saved directly onto my hard drive. I also have usb and firewire external drives available. Any suggestions on how to do this? And instructions please?
Thanks in advance!

Open your quicktime application. Under the file menu there are 3 choices pick new screen recording and have fun capturing screen recordings that you can make into training videos or just for your collection.
If you want to capture a picture of the screen hold the shift+command keys together and then hit number 3 to capture the whole screen and the same thing but hit number 4 to make a selection and capture just the selection.
Good luck and have fun.
Rick...
Message was edited by: SlickRick
Message was edited by: SlickRick

What's wrong with my iMac screen?

It just happened this morning when I woke up, this iMac is only few months old. And I did nothing last night, just edited some photos and watch The Walking Dead with VLC app as usual. Then I fell asleep and these lines just came up in the morning. What is this, is there anything I can do to fix this without bringing it to apple service? If I have to bring it to apple service, is it covered by the warranty?
Please help.
Thank you.

If your 90 day free AppleCare telephone support hasn't expired or you have purchase AppleCare then give them a call. If you don't have AppleCare (HIGHLY recommended) then you will need to schlep the machine into an Apple Store to have it looked at by a professional, it is covered by the 1 year warranty. The lines our describing are not visible in your screen shoot so I'll assume they are very fine.
Before you do anything though do some basics such as restarting the machine and resetting the PRAM.

What causes lines trough monitor

what causes lines through monitor

Take a screen shot & view that in Preview, move the Preview window around, if you see double lines it's a Video card/VRAM problem, if the lines do not move moving the pic around then it's the LCD or cable.
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/

My imac screen display is unfocussed, odd coloured and blurred (caused by rogue cate walking over keyboard). I have no idea what settings have changed or what to check. Any ideas?!

My imac screen display is unfocussed, odd coloured and blurred (caused by rogue cate walking over keyboard). I have no idea what settings have changed or what to check. Any ideas?!

It could be a number of keyboard shortcuts, here's a few.
If the screen is zoomed, hold CNTL and scroll down with mouse or trackpad.
If screen looks like a negative, hold down CNTL OPT CMD and click 8.
Let us know how what other symptoms are shown.
Regards,
Captfred

Anyone know what causes thin vertical lines on my iMac screen?

Anyone know what causes thin vertical lines to appear on my iMac screen?

Hello,
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
Take a screen shot & view that in Preview, move the Preview window around, if you see double lines it's a Video card/VRAM problem, if the lines do not move moving the pic around then it's the LCD or cable.

What causes iMac screen to white or partial white?

My iMac screen started going white or partially white when waking up. You can drag the mouse to fill in the screen. Does anyone have any experience with this problem?

Have a look at > OS X: Login window partially appears, cursor movement redraws screen

Why am I getting a white screen after downloading to OSX Mountain lion from OSX Snow Leopard. What caused this?

I just upgraded to OSX Mountain Lion from OSX Snow Leopard, thinking this was the thing to do. I have NEVER had any problems with Snow Leopard, but
after just a few days after downloading OSX Mountain Lion when I turned the computer on, the screen was white. Stayed white. I had to go onto another
computer to find out what to do. What caused this and will this happen again?

Did you see a circle made of light grey hash marks in the center/bottom of the screen? My iMac is 5 years old and for every update until 10.8.2 I would get the same white screen and the first few times I paniced and thought the machine was broken! Just let it play out until the desktop comes back up and it should not do it again until you do a system update.

IMac screen "ghosting" or "persistence"

After 3 trips to the Genius Bar with my iMac and 4 Tech Support phone calls, Apple has washed their hands of a problem I am having with my 2-year old iMac. So far the hard drive has been replaced as well as the LCD screen. Yesterday, an Apple senior technician told me that the problem (that I will shortly describe below) is not a hardware problem and therefore is my problem, not Apple's, to solve by ME Googling a third party software solution, notwithstanding that all the software on the computer, with very minor exceptions, is Apple software and that my Apple Care extended warranty is good until June 2011. At this point it is looking pretty useless except for the trial and error troubleshooting they have done so far.
The problem started months ago with the screen all of a sudden going blank with everything disappearing including the mouse arrow. The screen would take on various colors, i.e., pink, purple, grey, white with blue vertical stripes, etc., but no icons or anything of any structure.... including the dock icons. The only way to get the computer back was a hard reboot by powering off and then on. It did not make any difference what program I was using or what was open or what was connected to the iMac (powered hub, printer, speakers, etc.). On the first trip to the Genius Bar, they could not duplicate the problem. On the second trip, the hard drive indicated 5 problems so it was replaced. Along with the above problem, I noticed what I called "screen burn" but what Apple calls "persistence." They did not do anything about that. So far, the problem with the blank screen has not recurred following the replacement of the hard drive and LCD screen. I'm not sure which action solved that problem.
I took a number of pics of the screen with my iPhone that clearly showed the "ghost" dock icons when the dock was moved to either side of the screen away from the bottom position. I sent them to Tech Support and was told to take the computer back to the Genius Bar, which I did. They were clearly visible and the next fix was to replace the LCD screen. When the "persistence did not go away after the screen change, I called Tech Support again and sent more pics of the ghosting on which the date on iCal could be easily read. The senior tech representative said he would send the pics to Engineering, which he did. When he called yesterday, he essentially said, "Too bad, it is not Apple's problem. You need to find a third party software fix. Goodbye."
Not only are there ghosts behind the dock icons, there is a vertical parallel line from the top to the bottom of the screen on the left 1/3 of the screen that will not go away. It was there before the LCD screen was replaced and still is.
I have a friend with a newer iMac than mine and he found that he had "persistence" on his screen last night, although his was not under the dock icons. His ghosting was on the left side of the screen toward the top of the screen. The easiest way to check for ghosting under the dock is to change the screen background to a solid color such as grey or green (a darker color) and then move the dock to the right or left side... assuming that it is on the bottom, which is where I normally keep mine. If you have ghosting (persistence) you should be able to still see remnants of the icons including their shape (square, round, star, etc.) and may even be able to read the date on iCal. This problem seems be heat related in that the ghost icons are harder, not impossible, to see after the computer has been asleep for a while. After using the computer for a while, the icon ghosts stand out remarkably well.
I'm guessing that Apple must be aware of this problem (though they don't want to admit it) since they increased the speed of the fan during the last trip to the Genius Bar. Until then, the fan could barely be heard, but now, it is loud, obvious, and obnoxious.... and it has not solved the problem.
Has anyone else encountered this issue? If so, have you solved it and how did you solve it? Did you find a third party software program that solved it, temporarily or permanently?
I am more than a bit miffed at Apple for abrogating their responsibility by telling me it is my problem, not their's, and that it is my responsibility to find a solution.
I'm anxious to hear from others, but not wishing this problem on anyone.
will

I have just recently had this problem as well on my 24 inch iMac, though the evidence leading up to the problem wasn't as extreme. I didn't experience the screen going blank, things disappearing, or screen flashing pink, purple, grey etc.
I do however have an "image persistence" or burn-in issue. I leave a window open for as little as 5 minutes and when I move or close it a faint representation of that window remains burned into the screen. It seems to be most evident with high contrast websites, such as Google. When I leave the google home page up for a few minutes I will get a burned in Google logo on my background along with the address bar and a box the size of the window.
When I first noticed the problem I took it into the Apple store to have it checked out. The genius there listened to me patiently as I described the problem but wasn't sympathetic when he tried to replicate the problem by letting a window stay open for at most 30 seconds. He didn't say anything about not being able to see the problem himself but sent me home with a Work Authorization to replace the LCD panel. The store got in the 755 dollar part a couple of days later and I took my computer in again and they replaced the panel. They called me up a day later to pick up my "fixed" computer I took it home to test it out and the exact same problem was still there.
So I call up Applecare and explain what happened and told them how stupid it was that they sent me home with my computer and before verifying if they even fixed the problem. They agreed that it's a hardware problem and it's a possibility that it could be the logic board. They set me up with another appointment at the Apple store. So I take it in again and tell them that the display was replaced a week ago, and that it had the exact same issue as before. They get me to show them them problem again... this time he actually acknowledged that he saw burn in on my screen and told me that he will order in another LCD panel because the one they put in must have been faulty. I told him how ridiculous it was to replace the screen again because it seems very unlikely that the new display would have the exact same problem as the old one. I asked him what is going to happen when that comes back with the same problem and he didn't have a good answer.
So... instead of really addressing my problem this Apple store will have spent $1600, nearly the cost of a brand new 27 inch iMac, to not fix my problem. Had I not been protected by Applecare I wouldn't have been able to afford all of these replacements. Applecare should be built in to the cost of the computer. These computers NEED three year warrantees. I love it to death, and haven't had any other problems (knock on wood). But I'm an illustrator; I work almost exclusively with Photoshop doing colour and image quality sensitive things. I feel your pain man. I'll let you know the outcome of this. Who knows, maybe the genius was right and that the part they gave me was faulty and by coincidence it had the exact same problem as the one that shipped with my computer. But that leaves me to question the reliability and quality of the parts they are using.
I've been looking around on forums and there are a ton of different issues with this display. In fact you know if it comes up as a google suggestion when you search, there's a problem. Just type "+24" iMac d+" and Google will help you out by suggesting "+24" iMac display problems+". We're not alone.

HT201335 What causes the TV screen to freeze but sound continue on TV when using Air Play from I Phone?

What causes TV screen to freeze but sound continue on TV when using Air Play from I Phone 4?

First try rebooting ATV and router. Beyond that, it's probably something within the network, typically interference.
To get a report of the network go to istumbler (Mac) or netstumbler (PC). Look for signal strength and noise.
If on wifi try ethernet.

Mac randomly crashes, screen turns green and white, and it works fine upon restart. What causes this and how can I fix it?

My MacBook Pro 13 inch (I've had it for about a year and a half) has started crashing randomly. It happens about once a week and it will happen when I'm in the middle of either watching a video, typing a paper, playing a game, etc. The computer clicks loudly and the screen becomes a series of green and white lines. It works fine upon restart, but it's still annoying whenever it happens. What causes this? Is it fixable?

The image suggests an issue with the graphics board.
The issue may happen more when your machine is generating additional heat, as when you're watching or processing video, or gaming. I can't say for certain, of course, but certain things will reduce the chance of the problem recurring:
1. Keep your machine as cool as possible. When there's additional heat, turn up the fan, or use an app like HD Fan Control to reduce the heat. Use your computer the way you see fit, but be conscious of heat.
2. Back up on a regular basis. Logic board problems can lead to more serious issues down the line, so backing up is a good way of safeguarding your data.
3. Look up "Logic Board Woes" on Google for a comprehensive discussion of the issue.

Can I mirror what's on my iMac screen to the Apple TV?

I'm thinking about buying an Apple TV but I want to know if I will be able to mirror what's on my iMac screen to my TV in the living room. (Ex: show a webpage on my tv.)
Thanks.

Welcome to the Apple Community.
No, you can't currently do that from your mac/pc, without resorting to 3rd party software which is so unstable I wouldn't wish to recommend it.

I am having dark blurred light ghosting effect on my imac screen. Does anyone experience this?

I am having dark blurred light ghosting effect on my imac screen. Does anyone experience this?

When posting in Apple Communties/Forums/Message Boards.......It would help us to know which iMac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
***This will help in providing you with the proper and/or correct solutions.***
Can you post a picture of your problem? Sometimes, that helps. You did not mention where this ghosting effect takes place? Startup? Finder? Browser?

What causes my iPad screen to enlarge all icons

What causes my screen to enlarge itself and stay that way until I restart my iPad

Turn off Zoom
Settings>General>Accessibility>Zoom>Off

What causes ghosting on an iMac screen (27")?

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