Previous 1 2 3 4 Next 1,624 Replies Latest reply: Jun 8, 2014 8:00 AM by CT Go to original post Branched to a new discussion.
  • steinzeug Level 1 Level 1 (10 points)
    This problem really needs to be adressed by apple.
  • Level 1 Level 1 (0 points)
    Yeah I am also experiencing the same flickering problem.... This is extremely frustrating !!!
    Apple, please can you sort this one out .... !!!
  • andrew Bobyn Level 1 Level 1 (5 points)
    I too am getting a blinking screen, while using the GeForce 9400M unit. So far it seems to come up every couple of days.

    More problematic is that sometimes when waking from sleep with a larger monitor plugged in - the larger monitor frequently doesn't come on until I remove & re-plug in the MiniDisplay port adapter to sort of wake the card up. Sometimes the larger just turns off and on again numerous times until I remove & re-plug the adapter in. That seems to help.

    My (replaced) powerbook never had this problem.
  • munchnstuf Level 1 Level 1 (0 points)
    The gears are in motion....
  • munchnstuf Level 1 Level 1 (0 points)
    Well, it's been just over a week since Apple was kind enough to replace my MacBook Pro with a brand new one and I'm pleased to say that this one has been completely Blink-Free! No problems whatsoever.

    I want to thank Apple for the quick response to my problem and the hassle free MBP swap. I hope that all of you with the same problem are/were able to find a similarly quick solution. I guess that the blinking problem was isolated to a just few 'bad Apples' in the bunch.

    Thanks everyone for the replies and thanks again Apple for the great service and beautiful products!

    Merry Christmas to all...+and to all a good night!+
  • Robert Derelanko Level 1 Level 1 (30 points)
    I also had this problem only on the 9400 chip.. Although mine is very rare.. maybe once a day or two.

    Haven't used the 9400 much since my last logic board replacement so I can't comment if the newer chips are doing it as well.
  • sammiemo Level 1 Level 1 (0 points)
    It sounds like I had the same problem. Called Apple Support and sent it in for repair. A couple days later I got it back. I think this is a production issue with some of the NVIDIA chipsets.
  • Raphael Brand Level 1 Level 1 (0 points)
    My Mac Book Pro, 2.8 Intel Core Duo, also blinks, that is the screen, when using the slower graphic processor flashes really quickly, maybe every 10 minutes orso.
    i have tried playing around with different display settings like one site suggested but that didnt do anything, also resetting PRAM (option plus p and r, restarts) , i have not tried yet.
    i also noticed that sometimes when it has a few programs open and i worked on Aperture, something a computer with this speed should handle easily!! the computer frooze and the hd started to sping fast and faster, and the cpu got really hot till i just had to restart with power button.
    I love the machine but something isnt quite working the way it should....
  • Raphael Brand Level 1 Level 1 (0 points)
    after running the mac for a longer a period of time the flashes/blinks start to happen with shorter intervals, cannot put a timer on it but now it seems to happen every 4 minutes...its a bit frustrating and i hope Apple will come with an explanation on this site soon,
  • marco21 Level 1 Level 1 (0 points)
    I've extact the same problem with my late 2008 MBP. Sometimes, the upper area auf die display flashes for a millisecond a black bar. And sometimes, the entire display flashes black for a millisecond. It's absolute randomly.
    All these issues happens, when the 9400M is activated.

    I hope, it's a software-issue.....,but did the late08 Macbook's have the same 9400M-display-issue??

    Here is a pic of my OS X-desktop, when the black bar appears (it's photoshoped, because i can't know, when the next "blankbar" appears, to make a photo or video with my digicam:

    Message was edited by: marco21
  • jsqhoward Level 1 Level 1 (0 points)
    My new MBP (late 2008) also blinks intermittently when using the 9400 chip. Every minute or so. I contacted Apple and he took me through a bunch of stuff, but the problem is still there. I would hate to have to send the laptop back since I am overseas, and hope that this is a software problem that can be fixed through an update. Anyone know if a solution is on its way?
  • Christmas Eve Level 1 Level 1 (0 points)
    You can add me to the list of random quick screen flashes. This only happens when using the 9400M graphics. Not sure what's causing the problem but I hope it's a software issue and not a hardware one. Fingers crossed...
  • pierocampanelli Level 1 Level 1 (0 points)
    I am experiencing the same problem not only when scrolling:

    Randomly top section of LCD flicker for 1/20 second
    Sometimes it happens every 5 minutes. Sometimes every 50 minutes. Sometimes never happens
    It happens only with 9400 chipset at whatever level of brightness I put and with auto brightness enabled or disabled
    It seems to happen more frequently after a wakeup and with an external monitor connected through DVI cable
    It is terribly annoying !!

    I went to the local apple store (where i bought the computer) to obtain a DOA (Defect on Arrival) but the problem didn't happen ....

    What can I do?
    Did you find a method to reproduce it to demonstrate the problem?
  • marco21 Level 1 Level 1 (0 points)
    I've noticed, when a video on Youtube is playing, the flicker appears sometimes often.
    I think it's a software issue on the relativ neu 9400m chipset-graphic. It's new to Apple.
  • pierocampanelli Level 1 Level 1 (0 points)
    I did the following experiment. I logged in after a wakeup. I put dim to low level and I observed the screen for 20 minutes doing nothing. Fault happened 3 / 4 times. It is a very fast blink on the upper section of the LCD.

    I confirm that it seems to happen only with 9400 chipset and it happens on a cold start (so I exclude heating problems).

    I think is an hardware issue with the combination LCD revision / chipset revision.

    Here is my hardware version:

    Chipset Model: NVIDIA GeForce 9400M
    Type: Display
    Bus: PCI
    VRAM (Total): 256 MB
    Vendor: NVIDIA (0x10de)
    Device ID: 0x0863
    Revision ID: 0x00b1
    ROM Revision: 3343
    gMux Version: 1.7.3
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