IMac screen goes dark

When waking computer, screen flashes then goes black again. But it's on. Computer goes to sleep or screen goes black - it looks asleep - out of no where, even while typing, the screen starts dimming as if I wasn't using it.
Does this sound familiar?
I have the latest Lion - thought about Mountain Lion but haven't been able to see the screen long enough to install.
Help....should I take it in to a mac shop?

Have you blown the dust out lately?
Let it cool for an hour or 2 & see if you can get these...
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/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
Forget trying o Upgrade for now... or maybe forever.

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Imac 2012. screen goes dark in the middle of working.

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My screen on my iMac 2008 goes darker in the top 1/3, readable but why?, My screen on my iMac 2008 goes darker in the top 1/3, readable but why?

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Either the display or graphics card is in trouble. Run Apple Hardware Test in extended mode three times back to back. If errors appear then a hardware issue is confirmed, the next step would be to take the machine in for repair. Because the machine is 6 years old now you may want to consider looking into a replacement for it.

When I power up my mac, I see the white screen and the apple icon. After a few seconds of powering up the screen goes dark. Yet I still can the mouse arrow but nothing else.

When I power up my Imac, I see the white screen and the apple icon. After a few seconds the screen goes dark. I am able to still see the mouse arrow as I move it around. But nothing else. What is the problem and how do I recover?

Try this from another user:
1. Shut the computer down by holding the power button for 10 seconds
2. Restart the computer and press shift at the same time until you see the progress bar start moving
3. Once you reach the point where your screen goes dark and you see the cursor, type the first letter of the username for your computer, then hit Enter, then type your password, then hit Enter.
4. After a moment, you should see the spinning beach ball
5. Your screen should then move on to something along the lines of "Completing OSX Installation" (I can't remember the exact wording). Let it finish. After that it should go to your normal desktop and the issue should be fixed. (If your screen goes pitch black during this process, hit the space bar. I thought it wasn't working, but the screen was just sleeping).

Imac screen went dark after power interruption any suggestions?

My son's imac screen went dark after a power interupption (someone turning the computer off by pulling cord out of electric socket) and I can't get it to go back on. I've already tried depressing the "command, alt,p and r" keys to get a restart, and while it did restart, still no picture on the screen. Occasionally you can see white staticy lines, but mostly it is just dark. I've seen the suggestions to update software and back up data but that isn't possible as far as I can tell because I can't see anything on the screen - it is totally dark! Any suggestions? He is coming home from a trip today and hasn't had any access to computer for some time - he is going to freak

First try iMac SMC and PRAM reset, please do each of them 2x. If that does not work then try restarting in Safe Mode, this will clear some caches. You did not mention the version of OS X running on the machine, if you are running Snow Leopard then install the Snow Leopard disc in the SuperDrive and restart, when you hear the start up tone hold down the Option key and start from the SL disc and run Disk Utility and Repair Disk Permissions & Repair Disk.

MacBook Air Boots to OS, then screen goes dark.

I have recently been working on an older style (A1304) MacBook Air with the 128GB SSD. I've been working on Mac's for years, and have worked on hundreds, but this is the first time I've ever come across this particular issue.
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Boot computer to a Flash Drive with Snow Leopard Installer and once the blue screen comes on as if the installer is just about to pop up, it "goes to sleep" immediaetly. Though, the backlight and computer will stay on in the Apple Hardware Test for as long as I want. (ran it several times, "no trouble found". Also reset the PRAM, nothing helps.
I was wondering if anyone has ever come across this. Completely baffled on whether it's a software or hardware (or combination of the both) issue I'm having.

The keyboard and trackpad reside on top of the motherboard and all the components of the computer. The keyboard and trackpad are not liquid proof. It is VERY likely that the liquid made its way to the motherboard and has affected those components. If EVER there is liquid spilled on a computer, the last thing you want to do is A. Turn it on to make sure it is working.. and B. Plug it in and charge it. Do the EXACT opposite. Unplug and turn off all power, and, if possible, remove the battery from it. The liquid itself doesnt do the damage...the damage is done when the liquid comes in contact with the circuits and shorts out the contacts and components. You could try to connect to an external monitor, if you have the means to do so, to see if it makes a difference, but it probably will not. I seems that the motherboard is not functioning correctly.

HI all, i'm using Mac Pro 15" Retina. My screen goes darker and after brighter after a while? How to fix it?

HI all, i'm using Mac Pro 15" Retina. My screen goes darker and after brighter after a while? How to fix it?

System Preferences > Displays.
De-select "Automatically adjust brightness"

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Hi
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For the past few days, everytime I connect the power cord, the screen goes dark for a second. The same thing happens when I disconnect the power cord. Can someone help me find out what is wrong with it? Is it a hardware issue or is it just a momentary glitch (It just started happening yesterday)?
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this is a normal behaviour it happens all the time. It is your refresh rate changing between different power setting. Set the screen refresh rate at 60 hz for both battery and with ac adapter connected this should prevent the momentary blanking of the lcd.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

When I touch my iPad screen to execute an app, the screen goes dark then the app icon reappears. The app does not execute.

When I touch my iPad screen to execute an app, then the screen goes dark then the app icon reappears. The app does not execute. Any thoughts?

Try a Reset...
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Basic troubleshooting
From Here
http://www.apple.com/support/ipad/basics/

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I am having trouble with my iphone 5.
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Suggestions?

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When I use Adobe Send the screen goes dark when I hit send but never seems to complete the send task! and recover the screen.F

when I use Adobe Send the screen goes dark when I hit send but never seems to complete the send task! and recover the screen?F

Hi frank at luray,
Does this issue occur with any file that you try to send, or do you find that it's specific to one file? If it's a file-specific error, and the file is large, please try sending the file via Adobe SendNow. (You can sign in to Adobe SendNow at Sign in or create an account | Adobe SendNow using the same credentials you use to sign in to Adobe Send.)
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Yes
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While using Verizon Navigator, Curve 8330 screen goes dark unless I continue to hit the rollerball every few seconds. The security option allows for a 2-minute window but, at times, I will need hours of screen light. How do I correct this?

dl54
I'm sorry to hear you're having some problems with your device and the new software. Software updates are designed to enhance features and function overall, we don't want this to take away from it. Not to worry, we can help fix this. All you have to do is go to Settings>Display>Screen timeout>change to desired setting.
AdaS_VZW
Follow us on Twitter @VZWSupport
If my response answered your question please click the �Correct Answer� button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!

IMac screen goes dark

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