Uneven display backlight

Now that I finally got my display flicker fixed (for now) I am finally beginning to notice that the backlight isn't perfectly evenly uniformly lit like a CRT or even a desktop LCD which can have multiple light tubes. Looking at Tom's Hardware for the first time in a long time last night, I see that display uniformity is not one of the characteristics of even desktop LCDs.
On my MacBook, I can perceive that the right side is slightly dimmer, the bottom side is slightly dimmer, and a touch on the left.. center and top regions seem fine. It is subtle but it is there and a camera could probably see it better.
Par for the course with this screen?

Unfortunately, Apple geniuses have been told to say that unevenly illuminated displays are 'within specifications' no matter how bad they are. Of course, Apple would be swamped with returns and replacement requests if they actually admitted that it's not acceptable. You need to know what is normal or not before you go in and then stick to your guns and insist that they replace it.
a certain degree of uneven illumination probably is normal. I've never seen a macbook or macbook pro that has not had some degree of it. These bright displays tend to show it more than the older, but dimmer, Apple laptop displays.
Good luck!

Similar Messages

  • Macbook Pro Uneven display backlight

    Hi
    I would like to know if uneven backlight on my macbook pro is covered by warranty
    it was hard to get a good picture but,
    http://the.cave.in.googlepages.com/uneven_backlight.jpg
    sometimes its even worese
    the display also flickers sometimes very lighyly (at 50hz etc.)
    also
    is there a good reason that while probing apples site
    i could not find a single support e-mail address ?
    cheers.
    Brazy
    .est

    If the screen lighting is as bad as the photo seems to demonstrate, then yes, it's definitely a problem that would be covered by warranty. The screen should never actually flicker, though, since an LCD is refreshing pixel-by-pixel at 60hz, perhaps your brightness settings keep changing? If not, then it could even be the inverter (if you're using one of the CFL (pre-Santa Rosa) models). Either way, I'd try to get over to your nearest Apple Store when you can.

  • Display, Backlight & OS issue

    Hi all,
    So, I opened my Macbook Pro 13" Late 2011 this morning to find the screen behaving strangely.  There was a blue tint spreading from the left side, like ghosting, but more streaky.
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    I power up and the screen doesn't even switch on. No flicker, no power.  Also, strangely, the keyboard backlight doesn't work either.
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    2. Is this hardware part of the logic board or can it be replaced separately?
    3. Would the issue with disk permissions be linked to the display problem and could a reinstall of Mac OS fix the display issue???
    Any more info you need, i will be glad to provide. Bear in mind I do not have a functioning OS to give logs etc.
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    You should do what's easy for you. Amazon or service center.
    A product is replaced withint the first 7 days of purchase if proved defected. 
    You have warranty, so you should probably go to Sony service center and see what they say. Most probably you won't need to contact Amazon. While the Amazon deal is good as well. Get the money back and buy the SW from Sony center.
    Discussion guidelines.
    Message me or any other moderator to seek help regarding moderation.

  • Why won't my display backlight come on?

    I have a unibody MacBook Pro purchased in late 2009.
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    Perhaps related or unrelated is my keyboard backlight also doesn't work.  I can turn the brightness up and down using the F5 and F6 keys and the indicator will come up on the screen showing the brightness going up and down, but the keys themselves are not lit at all.
    Was there a recall sent out about this issue?  I do have AppleCare.
    Thanks.

    I have the same thing, not only my current Retina MacBookPro (Mountain Lion) but on my previous 2008 MacBook black (Lion). I find it very odd that I'd have the exact same issue on two different computers; there must have been a setting on the old one that got migrated to the new one somehow?

  • PowerTOP: 2x Display backlight

    Hi there,
    On my Thinkpad X200T,PowerTOP shows me 2x power consumption for Display backlight.
    See this screenshot: http://i.imgur.com/mP0H6hX.png
    How should I interpret this?
    Does my display use 4W in total or do I have indeed two different display backlights due to the tablet functionality of my thinkpad?
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    lrwxrwxrwx 1 root root 0 2014-04-02 19:18:40.580222111 +0200 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
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    Last edited by orschiro (2014-04-02 18:18:37)

    orschiro wrote:Furthermore, I think it only stores the current brightness level for restoring on boot, correct?
    Yes thats what the man page says
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    will disable the service and result in a 100% backlight setting with no adjustment possible...
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    # systemctl mask systemd-backlight@backlight:intel_backlight.service
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    Last edited by Head_on_a_Stick (2014-04-03 20:15:47)

  • Display Backlight - uneven lighting

    I have turned off the option "Automatically adjust brightness as ambient light changes" but my screen is still getting slightly brighter and darker for short intervals.
    Anyone else think this is an ominous sign?

    Some people, myself included, have noted - despite all settings unchecked - the screen darkening on idle, then returning once you're not idle.
    I'm not sure if this is your problem, but this is what a few of us have experienced.
    Some have even reported it on powerbooks.
    Here's what we do to help, but unfortunately, not solve:
    1. Make sure all settings are unchecked, like you mention with your ambient light sensor - also the "dim display before sleep" too - on both power adapter and on battery
    2. Lock those settings using the lock in the lower left corner
    3. If that doesn't work, try unplugging power, and then replugging it in
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  • IdeaCentre B520 display backlight issue

    I have a Lenovo Ideacentre B520 All in one. It powers on alright. But the LCD backlight does not come on. I can see a faint picture on the screen if i use a flashlight. The unit's Backlight converter board i noticed the capacitor on it is damaged. I can order a new board and replace it (easy enough). I was wondering if this is a common thing on these all in one units? Another person told me it could be the mainboard of the unit.  I'd rather spend about$50.00 than 189.00. Also when i hook the unit to HDMI out and use a external monitor i see the lenovo splash screen, but when i install a hard drive after the BIOS screen it locks up and i have to restart, but if i do not install a hard drive, then i can boot ubuntu or memetst (just for testing purposes). Any ideas?

    Yes, at maximum brightness level the backlight bleeding is very visible but I use it at 5 or 6 level where it has excellent contrast ratio considering how crappy current notebook displays are in general. The uneven backlight is caused by fancy LED backlight which is still not able to deliver similar quality regarding uniformity as good old CCFL backlight (that's why professional LCD monitors still rely on W-CCFL backlight). But I agree that the top-left corner is way too much bad and might indicate that the panel is seated badly in the frame. On the other hand my old IPS panel in R51 also have backlight bleed at maximum brightness level.
    Major problem is that Lenovo is still not able to fix the stupid bug with brightness level always set to max in BIOS screen that the backlight bleeding is very visible and irritating everytime you boot your machine.
    IMHO, the X220 IPS panel is still much better than any ugly contrastless TN panel Lenovo puts into ThinkPads (except 15" FHD). I bet that you would hate the X220i TN panel more than this one
    There are also two different revisions of the IPS panel, the second one fixes problems with image retention. As for comparison with Z60m, X220 display lid is much more fragile so the panel is not protected well against pressures and flexes. In any case panel flex should affect the backlight bleeding temporarily only. If it persists it is subject to repair (replace, reseat etc.).
    Unfortunately I don't have any good low-light camera that takes useable pictures in dark environment so I can't post relevant images of the backlight bleeding.

  • X220 IPS display backlight issue (with photos)

    Hello,
    I've purchased the Lenovo X220 laptop with the Premium HD IPS display and I do have a problem with it (see below).
    Laptop was purchased something like month ago and I've spotted this after I've started to work with it more heavily but after 14 days, so I was not able to return it to the seller (http://www.lenovoonline.cz).
    When you put backlight to maximum you see that the display is not evenly lighted and forming bright spots on the bottom of it. It's most noticable on the black background.
    I've sent notebook for repair (http://www.pcnet.cz) with this description (translated to english):
    "With maximum brightness set and the black display/background (eg. BOOT screen) on the bottom edge of the display there are visible white spots/maps. Small but visible and not even with different sizes. It's most visible on black background and while limiting external light (darker room, working in the night). Spots highlights even more when you try to pull the display towards you into steeper angle."
    The laptop has been in the repair for 2 weeks and the result was this description:
    "This kind of display is very sensitive to any pressure, and it will result in the brightening the place. It is specific for this model line and it's not the reason to warranty repair. We recommend to lower the brightness level in the darker room. Check of the display frame has been done and no problem has been found."
    Later they said they've replaced the panel too.
    However the issue still persists (see attached photos).
    Let me say few words about this:
    display is showing the spots while in rest I'm not touching it, if it's sensitive for pressure than it is indicating that there's some pressure on it while mounted in the frame
    I want to have backlight lighting the display evenly on the whole surface area, that's the correct function of a product anything else is NOT
    if they claim this is how it should be and it's actually a "feature" of the PREMIUM display then if I had known I would choose regular TN display and even save some money, needless to say that in that case the word PREMIUM sounds like a bad joke
    after lowering brightness level problem doesn't go away, still visible just gradually slightly less, depending on the brightness set
    if you are working in the night without external light this is VERY irritating
    So my question to you X220 community is, do you happen to have same issue?
    as they say it's "normal" with X220
    Thanks
    EDIT1:
    I've done a search now and it seems I'm not alone with this issue
    PS:
    I'm attaching two photos.
    First is the X220 (booted into GNU/Linux with X running and mouse as reference).
    Second is the very old Z60m (booted into Windows and running blank screensaver).
    Compare for yourself which one you would prefer.
    It was shooted in absolute dark (I'm used to work like that) with Canon EOS350D on tripod.
    There are some slight artifacts which you normally not percieve but anyway I think it clearly shows my point.
    X220
    Link to image 1
    Z60m
    Link to image 2
    Moderator note: images larger than 50k converted to links per forum rules: Lenovo Community Participation Rules

    Yes, at maximum brightness level the backlight bleeding is very visible but I use it at 5 or 6 level where it has excellent contrast ratio considering how crappy current notebook displays are in general. The uneven backlight is caused by fancy LED backlight which is still not able to deliver similar quality regarding uniformity as good old CCFL backlight (that's why professional LCD monitors still rely on W-CCFL backlight). But I agree that the top-left corner is way too much bad and might indicate that the panel is seated badly in the frame. On the other hand my old IPS panel in R51 also have backlight bleed at maximum brightness level.
    Major problem is that Lenovo is still not able to fix the stupid bug with brightness level always set to max in BIOS screen that the backlight bleeding is very visible and irritating everytime you boot your machine.
    IMHO, the X220 IPS panel is still much better than any ugly contrastless TN panel Lenovo puts into ThinkPads (except 15" FHD). I bet that you would hate the X220i TN panel more than this one
    There are also two different revisions of the IPS panel, the second one fixes problems with image retention. As for comparison with Z60m, X220 display lid is much more fragile so the panel is not protected well against pressures and flexes. In any case panel flex should affect the backlight bleeding temporarily only. If it persists it is subject to repair (replace, reseat etc.).
    Unfortunately I don't have any good low-light camera that takes useable pictures in dark environment so I can't post relevant images of the backlight bleeding.

  • Display backlight correctly off, but LCD not shut down

    Hi, I have a small problem with the 3g. Sometimes after the phone has been in standby for some time I find the LCD on, even if the backlight is correctly off. I wasn't able to correlate the problem with any other app or action.
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    Sorry,
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