Display dims permanently independent of energy saver

My three days old MacBook dims since this morning the display permanently down. The first time is became dark the only way to light it up again was a restart or th sleep more with waking up afterwards. Now the display is dimmed permanenty. By changing the brithness to zero and to maximum again I can get it light for some seconds and sometimes for some minutes.
Does someone know something about this phenomena?
Thanx, Ricky

J2Hlive, did you find out what was wrong? I'm having the exact same problem. I was in Safari and all of sudden it went dim, couldn't get it to come back on (brightness is set all the way up) so I restarted. Display was fine after restart, worked for about another 30 minutes and it went dim again and now won't come back up at all, no matter how many restarts, etc.
I can barely see the desktop but won't the backlight won't come back on.
Thanks.

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Display won't sleep using energy saver settings.

I’ve had this problem for some time. I repaired permissions and the sleep timer worked for about a day and then never again. I’ve tried closing all applications that might be running something, didn’t work. Reset pram and tried all the other things I’ve read about and nothing works. My son, who is a system admin and knows OS and Windows said he was having the same problem running Yosemite. I’m running 10.8.5 on a late 2010 iMac.

Long shot.
Do a backup.
Quit the application.
In Finder hold down the option/alt key while selecting the Go menu item. Select Library. Then go to Preferences/com.apple.systempreferences.plist. Move the .plist to your desktop.
Restart the computer, open the application and test. If it works okay, delete the plist from the desktop.
If the application is the same, return the .plist to where you got it from, overwriting the newer ones.
If you want to make your user library permanently visible, run the below command in Applications/Utilities/Terminal.
chflags nohidden ~/Library/
You will need to do that after any updates.

Display dims before sleep, no matter the setting

My MacBook will dim its screen (ie: reduce brightness) after about 10 seconds of idle time. I've read to stop this you need to uncheck the "dim display before sleep" checkbox under energy saver preferences. I've done this for both the power adapter and batery settings, but the display still dims! It will dim when running from the batery or the power adapter. It makes watching DVD's useless.
Has anyone else seen this? I find it annoying, but it's driving my wife crazy.
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One option to try would be to change the login settings so that you are not automatically logged in when you start up to the computer. After you make this change, log out, log back in, toggle that display sleep setting on then back off and check the result.
Something else that might be worth a try...
First, I'm not sure what preferences, if any, will need to be reset after this. Also, I have not done this and do not know the result. As always, backup your stuff.
1. Go to the folder ./Library/Preferences/SystemConfiguration (not your Library folder but the one at the root level of your hard disk).
2. Drag the file named com.apple.PowerManagement.plist to the trash. You will be prompted to enter your admin password when you do this.
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The Energy Saver in System Preferences has no effect.

Hi,
I have my Energy Saver preference set to turn off my monitor after 20 minutes of idle time. But the display never goes off.
Energy Saver used to work, now it doesn't and I have no idea why not, or what changed.
Any ideas?
Thanks!!

Perhaps you have some process keeping it awake for some reason. Have you installed any new stuff recently?
Try smc and pram reset.
Open terminal and copy/paste the following line, hit return, post the results:
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Also post the files in the following places:
your login items
~/Library/LaunchAgents (in your home directory)
/Library/LaunchAgents
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I noticed that the two sliders in the Energy Saver settings seem to work in tandem. If I set the Display to "Never shutdown" (I used this as I don't want my display/TV to go off in the middle of a movie as the mac sees there are no user interactions), and then try to adjust the sleep timer to anything (15min, 30min, etc.), it aligns the slider for the Display at the same point!
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That would be the simple logic. But, the scenario I mentioned is also a logical one. I have noticed that when I am watching a long Youtube video or an online movie from sites like Jaman, the screen would go off even though the system access is alive. At that time I have to scramble to the mouse/kbd to reactivate the display.
At the same time, I want to put the mini to sleep after 30min of inactivity. Hence, I want to set the sleep timer to 30min and the display to "never".
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Basically, reinstall the Boot Camp video drivers manually and if that doesn't work then go to the AMD/Radeon website and install the Windows drivers directly for your video card model.
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Hi Christopher!
Axl's suggestion is an excellent one!
The procedure is explained, with a bit more detail, HERE.
Quote:
"Not really a shortcut, but this method, will enable you to quickly access the Energy Saver pref pane.
Open System Preferences.
From the Toolbar's System Preferences contextual menu, select Hide System Preferences.
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Howdy,
Sorry to bother you.
My computer: iMac (21.5-inch Mid 2011), Mac OS X (10.7.3)
It took me some time to upgrade to Mavericks, but I did it eventually.
After having some problems with Spotlight (which was infinite looping indexing... and I just had to turn if off from Terminal), I realized I was encountering another big problem to me since the installation of Mavericks.
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Built into the Software now.
Do a backup.
Quit the application.
Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Preferences/com.apple.systempreferences.plist. Move the .plist to your desktop.
Restart, open the application and test. If it works okay, delete the plist from the desktop.
If the application is the same, return the .plist to where you got it from, overwriting the newer one.
Thanks to leonie for some information contained in this.
You might try Spotlight again. That is how the App Store knows what is installed.

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I'll provide some Proof
Link 1
Link 2
Link 3
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Doesn't sound like it. It sounds like you're being logged-off.
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Display dims permanently independent of energy saver

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