Cannot Turn Down Brightness Fully on ML

I recently replaced my 2009 15" MacBook Pro's display myself as it was coming apart. My MBP originally came with a glossy display and the replacement part I used was an anti-glare display. Thankfully the anti-glare display works, however there is a curious problem: I cannot turn the brightness down below 50% on Mountain Lion. In ML's system software it thinks that I can turn the brightness down to a low level, but it remains very bright.
Here's where it gets interesting: I tried installing Snow Leopard and I can fully control the brightness. I tired 10.7 Lion as well and also I can control the brightness fully. But bizarrely, only on Mountain Lion, I have this problem. I've tried resetting the SMC but it has not worked. Since I can't turn the brightness down low on ML, it drains the battery. Also I don't like using programs like Blacklight or Shades as the brightness problem is at a hardware level and the battery dranage is the main issue. Is there any fix for this? Or will I just have to go back to Lion?

I asked that question in regards to your comment about a red zone in volume. I do not have that on my phone.
You state that you have already done a restore, so the only other step in troubleshooting is to make an appointment at the Genius Bar to have the device checked by Apple.

Similar Messages

  • IPhone 4S can not hear music cannot turn down volume

    IPhone 4S cannot hear music playing cannot turn down volume or in control center... PLEASE HELP!!

    I asked that question in regards to your comment about a red zone in volume. I do not have that on my phone.
    You state that you have already done a restore, so the only other step in troubleshooting is to make an appointment at the Genius Bar to have the device checked by Apple.

  • Accidentally turned down brightness on mac book pro

    I accidentally turned down the brightness of my mac book pro all the way down last night. Now, the screen is totally black. How do i get it back to normal?

    thanks. will try this

  • Wierd keyboard ! volume buttons turn down brightness??

    Hi i have a macbook pro (early 2011) and it recently had a new logic board
    and since then the key board has been acting strange ,The up volume key turns the brightness down ,only one shift key works ,keyboard brightness up turns up volume and screen brightness ??
    also when pushing the buttons when typing they type the following   ``` [[[===
    has anyone got any ideas ?? or is it a case of taking it back to the apple store ?
    any help would be appreciated Cheers

    Hi i have a macbook pro (early 2011) and it recently had a new logic board
    and since then the key board has been acting strange ,The up volume key turns the brightness down ,only one shift key works ,keyboard brightness up turns up volume and screen brightness ??
    also when pushing the buttons when typing they type the following   ``` [[[===
    has anyone got any ideas ?? or is it a case of taking it back to the apple store ?
    any help would be appreciated Cheers

  • How to turn down brightness and sharpness ver 10

    How do you turn down the brightness and sharpness of the display. Flash ver 10

    Try this cute little freebe:
    http://www.splasm.com/products/productbrightness.html
    Otherwise, you have to mess with calibration or hack the unix kernel......

  • Can't turn DOWN brightness on MBP!

    This is weird: after waking my MBP from sleep, the display seems to be stuck on its BRIGHTEST setting.
    I can't turn it down; when I use Function + Brightness down, the brightness icon comes up with the all the bars empty. When I press Function + Brightness up, the first leftmost segment turns on then off.
    A reboot solved the problem. Anyone experience this?

    Try either or both of these and see if you can turn the volume down.
    Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
    Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

  • My iPhone 5 automatically turn down brightness to the lowest several times started yesterday.  I have checked that the auto brightness was set on after I had set it off!

    need advice on how to correct this.  thanks

    It's in warranty so take it in to get it fixed or exchanged.

  • My ipod touch 4th gen battery only lasts for 3 hours with wifi and brightness fully down

    My ipod touch 4th gen battery life if asful only lasts a maxium of 3 hours with wifi turned off and brightness fully down any suggestions?

    You can try restoring the iPod. However, it could be that the battery is going bad.
    Apple will exchange your iPod for a refurbished onewith a new battery for $79. They do not fix yours.
    Apple - iPod Repair price              
    A third-party place like the followingwill rplace it for less. Google for more.
    iPhone Repair, Service & Parts: iPod Touch, iPad, MacBook Pro Screens
    Replace the battery yourself if you are up to it. You can purchace a replacement battery for about $10
    iPod Touch Repair – iFixit

  • Display Brightness Turns Down at Tecra 8100

    Hi:
    I have bought a used Toshiba Tecra 8100 - after two month without problems the monitor suddenly turned down the
    brightness - at the beginning the turn-down was only few, now it is quite often.
    I tried already several things: first I thought it was because of the old battery ... but after buying a new one the problem was still there. Sometimes after freezing
    several times by closing or just by pushing the freezing
    button it works fine. Until now I cannot find a source of
    the problem (also changed the power settings ... doesnt matter) ... therefore I am quite at the end of my nerves - besides this little, but highly critical problem I am still very satisfied with this fine computer.
    Hope to find help in the forum.
    Regards, Bjoern

    I too am in the same situation, but I just wanted to clarify the problem. The machine boots up fine, but occasionally the backlight fails completely. This is quite sporadic although rebooting invariably fixes the problem (temporarily). Is this a software or a hardware issue?
    Thanks, David

  • The sleep button on my ipod touch is stuck down. i cannot turn on or charge. any ideas?

    the sleep button on my ipod touch is stuck down and i cannot turn it on or charge it. any ideas?

    You will need to get that serviced.
    Basic troubleshooting steps 
    17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G HD + OCZ Vertex 3 SSD Boot HD 
    Got problems with your Apple iDevice-like iPhone, iPad or iPod touch? Try Troubleshooting 101
     In Memory of Steve Jobs 

  • I hate the new operating system. Can't connect to wifi in home anymore even after a restore. Rhapsody no longer works on my phone either. Plus the brighth graphics are bothering my eyes even with brightness turned down. Any ideas on why rhapsody doesn't w

    I hate the new operating system. Can't connect to wifi in home anymore even after a restore. Rhapsody no longer works on my phone either. Plus the brighth graphics are bothering my eyes even with brightness turned down. Any ideas on why rhapsody doesn't why rhapsody doesn't work anymore?

    Contact Rhapsody to see if they have or plan to release an update for the app. Try uninstalling and reinstalling the app. Have you tried resetting your device by pressing and holding the Home button and power button until the silver apple appears?

  • When I went to turn the desktop on, the start up sound came on.  Then the screen was white with an icon flashing. The icon is a file folder with a question mark on it.  I cannot get it to fully turn on.  HELP

    When I went to turn the desktop on, the start up sound came on.  Then the screen was white with an icon flashing. The icon is a file folder with a question mark on it.  I cannot get it to fully turn on.  HELP

    Run a disk repair tool on the hard disk or install a new OS.
    (59898)

  • After 2 weeks my Iphone 4s shuts down by itself and I cannot  turn it on. What can I do. Itunes is telling me to restore the phone but the phone is saying the software isn't available

    My Iphone 4s  shut down by itself after a phone call and I cannot turn it on. I took it to istore and they said it was unrespinsive and there is nothing they can do? Anyone has a clue what can be done? When I connect the phone to itunes it indicates that the phone should be restored, however when i try to restore it, it says the "software for this iphone is not currently available" Is there anything I can do other than put this brand new iphone in the grabage?

    On computer, at the top of this page is a Tab for iTunes, click it, make sure iTunes is up to date. Also make sure computer Fire Wall and Anti Virus do not interfere with iTunes, turn them OFF to be certain.

  • Hi, Just bought an ipod classic 160gb and i notice that when I turn the volume down all the way, music is still heard, i.e. I cannot turn it down lower than a certain volume. Is there a fix for this? Thanks

    Hi, Just bought an ipod classic 160gb and i notice that when I turn the volume down all the way, music is still heard, i.e. I cannot turn it down lower than a certain volume. Is there a fix for this? Thanks

    I've got a feeling that's the way it is. I know that if I turn the volume down all the way, I can still hear the music very softly -- which is great for listening when I have a migraine!

  • Why does the screen turn back on when the brightness is turned down?

    Hi,
    I bought a macbook pro (Mac OS X 10.6.8), and just recently last week when i turn the brightness down to black, after a couple minutes later the screen turns back on. Then when i touch the trackpad then it goes back to black. Is there any way where i can change this setting??? because this didn't happen before and now it just constantly occurs.

    michael Kirwan wrote:
    Why does my mac mini automatically restart when I shut down?
    Seems that some process is calling it back.
    If I shut down via the log in screen it turn's off. What gives?
    Probably a process in your account and not systemwide.
    Go to System Preferences >> Accounts >> Login Items, and remove them. BShutdown and test. If not go to ~(yourHome)/Library/Contextual Menu Items and move whatever is there to the desktop. Test.
    EDIT: Also, unmount & disconnect all peripherals except Apple keyboard & mouse.
    -mj
    Message was edited by: macjack

Maybe you are looking for

  • Duplicate invoice. Query help needed

    Hi All, We need to build a query which addresses the following condition Some of the invoices were created against the wrong vendors and that money needs to be recovered. Some of them are already recovered while some are not * list out all the duplic

  • I cant update my ipod touch

    my computer is telling me that the the ipod software server could not be contacted

  • TS3899 Mail not getting messages from specific address

    I am consistently not receiving emails from a specific address in my Apple Mail inbox, but I have no filters enabled and the emails are not showing up in my spam and trash folders. If I follow directions for retrieving an email header in Gmail, I am

  • Volume Muted...Itunes won't play since upgrade

    I have just upgraded to Mountain Lion. Has anybody else had issues with the volume being muted. also Itune will not play any songs, just sits with the timer at 0 has anybody resolved this?

  • Poor Capture Options. Can't Log Clips. Cheap Samsung ... but still ... :(

    Mac User. My Samsung DV Camera isn't the best .. but at least I should be able to "Capture" the footage. Even with "Scene Detect" Off .. the tape will not continuously load. Maybe it's a crappy camera .. but why can't I just get the footage off it? I