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Author Topic: Twitchy Mac Book Pro  (Read 2055 times)

Offline gunug

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Twitchy Mac Book Pro
« on: February 16, 2011, 06:53:30 AM »
One of the high school techs has brought me a Mac Book Pro that has "occasional" video twitches.  That is parts of the display will turn brownish or yellowish at apparently random times when nothing different is happening software wise.  This will happen in the background file or, for example, in some lines of an Excel spreadsheet or a CS3 Photoshop image.  Turning the angle of the display doesn't seem to have any effect on it to cause it or make it stop.  The thing is in warranty for another year or more so if there is something really happening I'd like to get it fixed while the fixing is good!  No changes occur in the files or the data this is only a matter of appearances. Has anyone else seen this before?
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Offline chriskleeman

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Twitchy Mac Book Pro
« Reply #1 on: February 16, 2011, 02:56:48 PM »
Hi John,

Depending on the actual manufacturing date of the MBP, check this out:MBP Video Card Problems.

There are other discussions around, but without knowing the exact MPB you are looking at or the model of the video card, hard to say.

CK
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Offline gunug

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Twitchy Mac Book Pro
« Reply #2 on: February 16, 2011, 03:13:56 PM »
This is a:

MacBook Pro (15-inch, Mid 2009)
MBP 15.4/2.66/2X2GB/320-5400/GLSY

and it has the NVIDIA GeForce 9400m so I don't know if this link applies but I'm fairly certain that, if the thing cooks awhile on the tech bench, that it will misbehave in the way it's been doing for me.
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Offline krissel

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Twitchy Mac Book Pro
« Reply #3 on: February 17, 2011, 02:30:20 AM »
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Offline gunug

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Twitchy Mac Book Pro
« Reply #4 on: February 17, 2011, 10:51:48 AM »
Krissel - That is partially what I'm seeing in a white, text screen you get yellowish shadows cast like that.  In the normal, default, wallpaper file background you get shapes in the background where parts of the background turn brown or yellowish. . .these parts are normally one color out of all of them!  I'm looking for a firmware fix for this before I take it to the Applecare place.
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Offline tacit

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Twitchy Mac Book Pro
« Reply #5 on: February 20, 2011, 10:30:56 PM »
One of my girlfriends has that same model Macbook which developed identical video problems. Even though it was out of warranty, Apple fixed it for free. Apparently, there is a problem with some Nvidia 9400M Macbook Pros that Apple is fixing on a case-by-case basis. I would recommend taking it to your Apple store.
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Offline gunug

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Twitchy Mac Book Pro
« Reply #6 on: February 21, 2011, 07:38:13 AM »
This is being handled in warranty (we bought 3 years Applecare I guess); anyway it is a very strange little problem! smile.gif
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