Why does my screen keep dimming and brightening?

I'm just sitting here in front of my fire during a mid-March snow storm in Maine, and my screen keeps dimming and then brightening. It's getting quite annoying. What is going on?

OK, I figured it out - it's the auto brightness adjustment. Found the answer in the pane to the right of my comment.

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Why does my screen keep dimming?

Screen on macbook keeps dimming after a few seconds, even when I put it at the brightest and I'm in the middle of using it.

If that doesn't help, perhaps this is your cause:
https://discussions.apple.com/thread/5194100
Unfortunately, I haven't found the answer yet.

Why does my screen keep flashing and then turn black when I use the marquee tool?

When I bring up a photo to work on and i try to draw circle or square with the Marquee tool my screen flashes black and then stays black until I use the move tool?

This issue is associated with your graphics driver not being compatible with PS' hardware acceleration. Updating the driver if possible would be advisable, otherwise turn off OpenGL drawing under Preferences --> Performance.
Mylenium

My ipad2 screen keeps dimming and staying that way. And I can see the reflection of the app I most recently closed. Help?

My ipad screen keeps dimming and has ghost images of the previous open app. Can this be fixed? Help.

Did you ever resolve this issue? I have an iPad with a similar problem. After a software update the screen went very dim. I have just finished trying to restore the iPad to the latest iOS 8.1.3. The display is still very dim. The backlight does change when you adjust the brightness slider but at maximum brightness it is just barely possible to see what is on the screen. What makes me think this is software related is, like you said, there are remnants of previous screen images overlaying the current screen. For example, when I restored the ipod, I enter DFU mode so the screen showed the "Connect to iTunes" images. After restoring and rebooting there is not change but the "Connect to iTunes" images are still showing up on top of the normal screens. Even if I power off the iPad and turn it back on that image still appears as if it is permanently burned into the LCD. There are more previous screen images appearing underneath the current screen as well (e.g., I can see the System Settings window faintly under whatever screen I'm currently on). Would like to know if your problem required a new logic board, new LCD, or if you were able to resolve it with software tricks. Please respond if possible.

Why does my screen turn blue and freeze every time i try to plug in my 'mini display to hdmi' cable into my thunderbolt port in order to use an external monitor?

why does my screen turn blue and freeze every time i try to plug in my 'mini display to hdmi' cable into my thunderbolt port in order to use an external monitor? it only works if i turn the computer on with it already plugged in.

Do you have gfxCardStatus installed? Is your monitor set to "Integrated" or "Discrete". You want it set to Discrete to drive the external HDMI display.
Try resetting the PRAM and SMC
<About NVRAM and PRAM>
<Intel-based Macs: Resetting the System Management Controller (SMC)>
Are you sure you have a good miniDisplayPort to HDMI cable?
Do you have another HDMI display you can test against (your neighbor's HDMI capable TV).
Do you have friend that can test the cable using their Mac and maybe their TV or a monitor that has HDMI input.

Why does i tunes keep bouncing and not open after I have done an update

why does i tunes keep bouncing and not open after I have done an update ?

Hello, romani-jo.
Thank you for visiting Apple Support Communities.
Try resetting your System Management Controller or SMC. Try launching iTunes after processing these steps. If the issue persists, try downloading a fresh copy of iTunes by accessing the second link below.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
http://www.apple.com/itunes/
Cheers,
Jason H.

Please Help...why does my screen keep going to black in fcp?

I have just brought imac g5 (older version through private sale) and completed a beginners fcp course. When and got a lacie 250 , shot some stuff which I managed to capture! Then just tried to open project and now the screen keeps going to full black and I don,t know what to do! I would like to do a full system check and make sure all settings correct and to know why screen blacking out. I am very new to mac and don;t feel that at home with settings etc . Any advice would be very welcome and appreciated as I just want to practise now but I am stumped at the first hurdle!
ta
ali

New Discussions ResponsesThe new system for discussions asks that you take the time to mark any posts that have aided you with the tag and the post that provided your answer with the tag. This not only gives points to the posters, but points anyone searching for answers to similar problems to the proper posts. When you mark a post with the tag, it will also mark the thread as Answered. If you receive the solution or answer to your question outside of the thread, then, and only then, at the top of the thread, mark the thread as Answered. This will mark the thread as Answered without marking an individual post as .
If we use the forums properly they will work well...

Why does all videos keep buffering and not play

Why do videos keep buffering and play when I select them?

I am in Florida, and have a comcast business account and get download speeds of 22mbps (as tested).
The Apple tv is hooked directly into the modem with ethernet.
We have tried about 6 different routers with apple TV and none of them make the Apple Tv perform without stuttering and buffering. So we decided to use direct hook up.
I have called Apple repetitively because when trying to watch a trailer/preview, the preview stops and the buffering starts.
This will also happen when watching movies.
Lowering TV resolution to 600x480 does not help either.
Apple fail to tell me where their Itunes servers are located, so it's impossible to do a traceroute to see if there's a problem on the way.
Desperate with this situation I opened a DSL account with Centurylink :same problem!!
It seems that Apple should fix their Apple TV product before placing a product on the market that does not perform as stated.
We took this a step further, and purchased a few Apple Tv's which we are setting up with different Internet providers to see what the results are.
You may think I have nothing better to do, but I'm building a case against Apple and shall get to the bottom of this. There are no excuses for placing faulty products on the market.

Why does my screen show itunes and usb plug

Why does my iphone screen show itunes and a usb plug?

Your phone is in recovery mode. You need to connnect your computer to iTunes and restore.

Why does my screen keep freezing?

I am worried that my computer is heading for a crash. I bought it in January 2007 and it has served me well up until the last couple of months. The screen freezes more and more frequently. Although I have tried all three USB ports on the back, my wireless mouse freezes constantly. (Yes, I have installed new batteries multiple times.) Sometimes there are very brief flashes of black behind whatever screen I'm working on. Why is this happening and what's the cure? Many thanks.

Hello,
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at the top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
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/
Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?
How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.
In the Memory tab, are there a lot of Pageouts?

Why does my iPad keeps connecting and disconnecting from the new late 2013 iMac

Hi there,
I've recently bought a new late 2013 iMac and ever since then I'm not able to connect my iPad 2 to it. When I do connect it keeps connecting and disconnecting again and again for some reason. The cable is fine and I've tried it with other devices. Just wondered why this is and whether you guys can help me out.
Thanks a lot!
CitizenJohnny

Hi,
I had the same problem and just found a solution. I tryed restoring all content and settings on the iPad (Settings > General > Reset > Erase All Content and Settings). It took lots of time, however it didn´t work because when I connected the iPad and iMac the problem persisted.
Then I thought it wasn´t an iPad problem but iMac OSX problem. So I searched the web for "Reinstall Mavericks" and found this http://support.apple.com/kb/PH13871?viewlocale=en_US&locale=en_US.
It also takes like 6 hours with my internet speed. Next day I connected the iPad and everything is just fine.
I described both processes because I don´t know if in the end the iPad reset helped in the solution.
Hope that helps! good luck

Why does Black screen keep popping up

black screen keeps pooping up for no reason

It's been happening to me as well lately on build 10041 just before I upgraded to build 10049. On build 10041, it would usually happen to me when I was browsing the internet. The screen would go black once or twice and then recover. The
bad thing about this is my mouse would start stuttering to the point of being almost unusable accompanied with a beeping sort of sound coming from my audio speakers. Restarting the computer was about the only way I could clear the problem. I've seen other
postings about this elsewhere and the best that can be done right now is to report it as a bug using your feedback app. I have not seen the problem in build 10049 yet.

Why does my screen turns black and I have to reset the phone to make it work?

My phone is fully charged when suddenly the screen turns black it doesnt matter if I push the buttons the screen still is black, I have to reset the phone to make it work. When the screen is black and if you call you can hear is ringing but my phone does not sound.
I had a bad experience with this phone, to tell you the truth I dont even want it anymore, I have other apple products and they are excellent and had worked fine but the iphone is a dissapointment to me.

Go to an Apple store.

HT201412 why does my iphone keep freezing and when i keep going on to settings it comes up blank and shuts down the app

i would like to know why my iphone 4s keeps freezing alot and everytime i go on settings it goes blanks and shut the app down?
i cant use setttings at all

Why? Not sure, could be lots of different reasons.
However, if you'd like to know how to fix the issue, then have you tried the troubleshooting steps listed inthe article that you linked from?
When in doubt: Restart, Reset, Restore from Backup, Restore as New.

Why does my screen shake up and down?

My macbook computer screen shakes up and down so severely that it make me lose my place. Sometimes it just suddenly drops the page I'm reading a few inches, as if someone were controlling it remotely and couldn't see what I was reading unless they lowered the screen... This seems to only happen when I am on the internet, and my mouse icon sometimes disappears or goes a little haywire as well, as if someone else were controlling it. When I try to repair the permissions on my HD, I repeatedly get the message:
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
I also get other remote management error messages as well.
I am being stalked and would like to know if this means my computer is being routinely hacked into through remote management. It seems like it is.
Thanks!

Thanks for responding. I tried verifying the disk and both HD icons were error-free, but I can't understand why I have 2 icons for the HD in Disk Utilities. 1 is simply labelled MAC HD and the other is labelled:
Hitachi HTS542516K9SA00 Media
The following was found out about it under INFO:
Hitachi HTS542516K9SA00 Media Type :          Disk
Partition Map Scheme :          GUID Partition Table
Disk Identifier : Media Name : Media Type : Connection Bus : Device Tree : Writable :          Yes Ejectable :          No Location :          Internal Total Capacity :          160.04 GB (160,041,885,696 Bytes) S.M.A.R.T.Status: Verified
Disk Number :          0 Partition Number :          0
disk0 Hitachi HTS542516K9SA00 Media Generic SATA IODeviceTree:/PCI0/SATA@1F,2/PRT0@0/PMP@0
Why do I have 2 HD icons when I only have 1 HD? I don't know how to partition anything.
Thanks,
Linda

Why does my screen keep dimming and brightening?

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