Backlight problem on iMac?

My display seems to be getting dimmer and yellowish. Is this the backlight slowly failing? If so, it is hard to replace (I've changed the hard drive, so I'm not afraid of opening up the case)? Where could I get the required part(s) and for what cost? Thanks.

Does it do it booting in these two modes?
Safe Boot from the HD, (holding Shift key down at bootup).
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.

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Hello I have imac (27-inch mid 2011) 3.1ghz intel core i5 1tb serial ata hard drive, amd radeon hd 6970m my problem is imac works fine in safe mode,but when you try to startup normal it's connstantly restart by it self.

hello I have imac (27-inch mid 2011) 3.1ghz intel core i5 1tb serial ata hard drive, amd radeon hd 6970m
my problem is
imac works fine in safe mode,
but when you try to startup normal it's connstantly restart by it self.

in safe mode works perfectly,soon as I try to boot in normal mode it's keep restarting.on screen I don't see any line vertical or horizontal picture look normal on safe mode.but unable to start normal it just restarting over and over.I try another HDD but same things happen,I replace memory but still same.works ok in safe mode but not in normal mode.I will try to post system error report.

I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB)

I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB). When I play video formats like xvid, mkv, avi iMac freezes and emits horrible sound,in service said the problem is not overheating. Not a problem with memory or hard disk because I placed second correct parts.The same problem is with OSX 10.6.8 and 10.8.4 and other players.Apple hardware test found no problem and tech tool pro found no fault.
After five days of testing in the service they can not found fault and it was decided to change the graphics card.
New graphics have been tested for two days but it is not reproduced divx ... but their test software which did not find any fault on the old graphics...
Do I have the right to complain if repair does not fix the problem because I use non apple softwere and video formats.

You could look at the System Profile for the info it presents for the card. But why wouldn't you think it's not up to date if you have the latest install (according to your sig above)?
What program are you trying to run? Is there anything in the system log?
I think it's the program that's having the problem and not anything with your video software.

Having problems connecting iMac(late 2006) running 10.7.5 to a Samsung Flat Screen TV using separate audio/speaker cable and HDMI standard cable, mini-DVI to HDMI video converter. TV displays generic Apple galaxy background and "some" windows (e.g. scree

Not sure that I have selected the correct forum. Hope my questions are clearly stated.
Having problems connecting iMac(late 2006) running 10.7.5 to a Samsung Flat Screen TV using separate audio/speaker cable and HDMI standard cable, mini-DVI to HDMI video converter. TV displays generic Apple galaxy background and "some" windows (e.g. screen resolution choices). It does not show Mail or Safari menus. System preferences' display "gathered" the Samsung and chose its resolution. I did not find a way to select the Samsung as my display.
In addition to having old hardware, we have Verizon FIOS providing internet and TV access. Is there any way to make this work for us? We would like to stream video (Netflix) and view shows from the Web. Do we need Apple TV to do this? Or is it not possible with our old iMac? My husband thinks that our Airport could be a factor.
Thank you

Lately, I have been seeing a lot of posts with users trying to use their Macs/iMacs to mirror their streaming video from their Macs to an HDTV.
There are, actually, many alternatives to choose from than just from a Mac.
You need to have or invest in a WiFi capable router for all of these examples.
Apple TV only integrates with WiFi and newer Mac hardware. So, if you want to have total integrated experience, if you have a 2011 Mac or newer, you might as well pay the $100 for the AppleTV box.
If you have a older Mac, like I have noticed many users do, then you have other options.
If you want to elimate long cable clutter and having your Mac at the mercy of your TV all of the time, you can still use the AppleTV box independently or purchase cheaper alternative media streaming boxes from Roku, Sony, Boxee or any number of electronics manufacturers that now have media streaming boxes and media streaming capability built into DVD/Blu-ray players.
These eliminate long cable clutter by being close to the HDTV where shorter, less expensive cables can be used.
Another alternative for iPad users is to use an iPad with the USB/HDMI video adapter and use your iPad as the streaming box. This ties up your iPad in much the same way as it does with your Mac, but again the iPad can be close to the TV and use minimal cables to the TV.
Another alternative to is to use a combination of an iPad and your Mac to stream content that is only available to stream online from a computer. In this case, you can use a desktop remote app on your iPad and Mac. A good and cheap Desktop Remote app is Splashtop Remote. This allows you to completely connect your iPad remotely, over Wifi, to your iMac desktop. The app streams both video and sound to the iPad which is still connected to your HDTV. The resultant stream video picture will be smaller than the size of your HDTV, but it will still be plenty large enough to watch. Again, if you own a iPad and an Intel Mac, this method also allows minimal cabling to the TV.

IPod backlight problem...

Why isn't my iPod touch 2G 16GB's display not turning on? I know it's a backlight problem because I can faintly see the apple logo sometimes.

Bump

Problems with iMac retina 5K (artifacts, glitches and etc.)

Hello dear Apple.
I have bought new iMac with retina 5K display and I have found lot of problem with it. It was December 2014 when I got my first iMac. And after then I have found few real problems with it.
The first problem is I can't open high resolution image with standard Preview.app. I mean 'high resolution' - more then 30-40 megapixels. When I open them, I can see image, but only 2-3 seconds, and after that I see horizontal artifacts only. I can't open images, like this Rembrandt.jpg; Carpaccio.jpg; Holbein.jpg
The second problem, when I change resolution in to scaled mode (System Preferences/Display) for increase image on display. I found when select some area on background of desktop it has left some lines after itself. It is particularly unpleasant if you have plain colour desktop background. You can view, how does it look here.
The next problem with animation in different parts of interface, e.g. sometimes when I open Time Machine some parts of windows are freezing or appear some artifacts or glitches near borders of window. And I have the same situation, when I open Mission Control, or any Adobe app or other, or simply rename a files. I have found few discussions with problems like mine, but in the separate places
5K iMac - bad GPUs?
Graphic Problems with Retina iMac
iMac 5K and indesign glitch
And after that I want to tell you that I have this problems on four (4) iMacs. It was really difficult to arrange four replace. I have lost a lot of time an spent a lot of nerves for discuss and resolve my problems with Apple support. Finally, they told me that they do not know about problems with iMacs, and they could offer give my money back. I glad to get my funds, but now in my country price for iMacs has doubled. And if they refund my money, I can buy half new iMac only.
I am sorry for my language and style, but I do not know what I should doing with that. And should I hope, that my problem resolve with OS X updates? Or it is hardware problem of the whole iMacs 5K...

Yes Ralph, absolutely correct, 4 times. Do you have the graphic card the same as me, or m290? Could I ask you check your iMac for few things, please?
For the first, can you enlarge scale in System preference/Display and install plain dark color desktop background. Are there any footprints after rectangular selection like in my video https://youtu.be/dBglFvjJx1Q?
And for the second, could you download this image https://upload.wikimedia.org/wikipedia/commons/0/07/Rembrandt_Harmensz._van_Rijn _-_Nachtwacht_-_Google_Art_Project.jpg and open in plain Preview.app, and zoom it? Are there any glitches?
Thank forward.

Recd following error when attempt to open ebook using ADE 4.0 : "Unable to Download. Error getting License. License Server Communication Problem: E_LIC_LICENSE_SIGN_ERROR" iMac 10.8.5 Chrome Version 37.0.2062.124

recd following error when attempt to open ebook using ADE 4.0 : "Unable to Download. Error getting License. License Server Communication Problem: E_LIC_LICENSE_SIGN_ERROR" iMac 10.8.5 Chrome Version 37.0.2062.124
chat with customer service at book company i purchased file:
"Me: I installed the proper adobe software, adobe digital editions 3.0 (now have updated to 4.0) on my mac running os 10.85 however I am getting the following error code when i try to open the file:
"Error getting License. License Server Communication Problem:
E_LIC_LICENSE_SIGN_ERROR"
Charles P.: Okay, what you need to do unfortunately, is contact Adobe at http://www.adobe.com and they will need to get your license issue resolved.
Charles P.: Is there anything else I can assist you with today?
Me: title of error is Unable to Download
Me: i dont see how that would be an adobe problem?
Charles P.: I understand, but it appears that the reason for the download issue is because of the license error the license is related to the Adobe Digital editions software. I understand how this could be confusing but it's due to the authorization of the ADE software. Adobe would need to correct your account issue with the license
Me: ok but i thought this was a free license from adobe??!! this is just a digital editions reader, right??
Charles P.: That is correct it is a free license but your account has to be associated with one license and yes the Digital edition is a ebook reader that our ebooks use for you to view

Well, just for the halibut I tried opening the book again today and , GLORY BE!, it worked.
Guess it may have taken overnight for Adobe to OK my license to their free ADE software. Also works now using Bluefire app as the reader on my android phone, although it was a pain
to get the book file in the right file folder for bluefire to see it.
I hope that time also heels the issue with all other Error Getting License users.
panman

Again me - n73 backlight problem

Hi
my n73 has a backlight problem.Under a special angle ( there are dark stains.They are HARDLY noticable.

Maybe is the screen. Go to a Nokia Service to check that.

T420: Backlighting problem

Hello everyone, I have a Thinkpad T420 (6 months old) and I think I have a backlight problem. The backlight vanish at the startup of the computer and when I boot in Safe mode. Can anybody helps me ? Thanks !
Moderator Note: Edited subject to match content.

Hmmmm ... have you tried increasing the brightness? Any on screen display showing the brightness bars?
You can try uninstalling power manager, power management driver and hotkeys package then do a reboot then install all 3 again and see if it helps.
*Non Lenovo employee*
I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)

HT3964 1st problem was IMac running slow. Shut down and unplugged several times with each time reboot being worse. Now, unplug reboot and eventually wallpaper background comes up but there are no icons?

1st problem was IMac running slow. Shut down and unplugged several times with no correction. Eventually, shut down, unplug and reboot resulted in wallpaper background eventually coming on screen but no icons. Nothing after that.

Kurt, do you know which exact iMac this is?
Have you blown the dust out lately?
Does it do better if allowed to cool off for a couple of hours?
What do you see if you hold Option or alt key at bootup?
Does it boot from the install disc holding c key at bootup?

I had a problem with imac screen going black. apple store diagnosed prob with video card which they replaced. Brought it home, turned it on (have done this 4 times) it starts up, wheel turns, there is a long bar at bottom which fills up, then it turns off

I had a problem with imac screen going black. apple store diagnosed prob with video card which they replaced. Brought it home, turned it on (have done this 4 times) it starts up, wheel turns, there is a long bar at bottom which fills up, then it turns off

Apple guarantees their work, take it back.

24" iMac backlight problem

I've had my 24" imac for about 6 months. This morning when I switched it on the lower half of the backlight has not switched on (so the screen is dim at the bottom, and bright at the top).
If I put the computer to 'sleep', when I wake it, the bottom half of the backlight flashes on to normal brightness for about 3 seconds then switches off again.
..I'm assuming this can only be a hardware issue?!

Sounds like a hardware problem. However, you can try this procedure to reset the SMC (which controls power management in the iMac)
http://docs.info.apple.com/article.html?artnum=303446
If it's only six-months old, it's still covered by warranty. If there's an Apple Store nearby, take it in. You can make a reservation for the Genius Bar at
http://www.apple.com/retail/

IMac screen backlight problem

Hi
I have a 6 month old (late 2011) iMac 27" 2.7-i5-4MB/1TB, the screen constantly blanks with the iMac still running and the screen still with content on (can just see if I shine a torch at it).
Hot corners off - sleep set to 30 mins
I can bring the screen back if I press shift-control-eject and move/click the mouse, sometimes this lasts for 5 sec sometimes for 10 min or more.
Why is the backlight doing this, its seems there is a hardware problem that is restored (temporarily I admit) by a software action, I cant believe changing the backlight will fix this.
Does anyone have a solution or is it a case of getting it back to the mac tech's???
Thanks
Victor

Your iMac should still be under AppleCare warranty.
Sounds like intermittent backlight connection.
Bring it back to an Apple store or authorized Apple repair facility to be diagnosed and repaired.

IMac 27inch mid-2011 backlight problems!!?

Hi, first of all thank you for reading this, I bought my iMac mid-2011 on December last year, so as you can see I lost my warranty a couple of month ago, since last week my screen suddenly goes black, though if I point a lamp or any kind of lights to the screen I can see that it is on, I tried the opc+cmd+P+R reset, no difference, tried the Apple Hardware Test and wont detect any problems, so I´m getting really worried.
I called the Appe service and they wanted to charge me 49€ for telephone support, I didn´t want to go for it since I guess that if they can´t solve your problem you´d loose the 49€, anyways, I´m starting to think that there´s a HW problem on my display, that said, I have two questions to ask you guys:
1. Are there any other steps/possibilities I can try in order to solve the problem before I get to the Apple store with my iMac.
2. Is there any quality programs that would apply for this?
The saddest thing is that Im still paying for my iMac, and I really didn´t check on the time to buy an Applecare, now I´m regretting it, I would really like to try to solve this at home since I also don´t have a car and to carry it to the Apple Store by train it is heavy as ****!
Anyways, I would really appreciate any help you might give me, thanks again!

You will need to take the iMac to your nearest Apple Store for evaluation.

Backlight bleed on iMac 27"

I don't understand this.
Why is it that every iMac 27" has this stupid light bloom from the bottom right hand corner? It is incredibly distracting.
Having had several replacements for flickering and other problems, I can tell you that backlight bleed on these machines is very variable. But every time, there's this distracting white light off to the right and it is ******* me off.
After nearly three months of ******** with these machines, I'm asking for my money back.

Thanks for informing us on your decision.

Backlight problem on iMac?

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