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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.
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!+
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....
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
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?
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?
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
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0863
Revision ID: 0x00b1
ROM Revision: 3343
gMux Version: 1.7.3