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Currently Being ModeratedNov 12, 2009 2:32 PM (in response to Magnat)@Magnat:
It's hard to know what's going on here - it's conceivable that it is the NVIDIA issue, but there are many other problems you could encounter with the video chip. Only way to be sure is to take it to an Apple service place.MacBook Pro 2.4 G Duo, Mac OS X (10.5.8)
Currently Being ModeratedNov 12, 2009 4:16 PM (in response to Magnat)Had a little break thru I am now convinced that is some kind of problem with Apple's Update 10.6.2, just have updated to 10.6.2 again, and now after 10 shutdowns and reboots its working, but now instead of a black screen I have no sound, no matter how high the volume is when i shutdown, on boot is set to 0 (no sound), that isnt much of a problem, just raise it, i just dont know how the light keyboard buttons didnt work when before i tried to light up the screen, on the sound it works... Ill give it a few more tries then ill report back again, but so far so goodMacBook Pro 2.2ghz, Mac OS X (10.6.1)
Currently Being ModeratedNov 12, 2009 4:50 PM (in response to Magnat)No, done about 20 shutdowns and reboots ok, but now its the same, black screen + sound level at 0, i guess ill take it to an Apple Store for them to see it... If its the graphics card i guess ill buy a new one, this one with less than 2 years have the logic board change twice is too much for me :S If next time it breaks again and I have no warranty I it will be to much to repair... Anyway thanks for your help!MacBook Pro 2.2ghz, Mac OS X (10.6.1)
Currently Being ModeratedNov 13, 2009 4:49 PM (in response to Brett L)Hello, just wanted to give my current situation and see if it is falling in the same pattern as other card failures, and if it would be covered by the warranty or Applecare. I have a 2.4GHz Macbook Pro from from mid-2007, model ID MBP 3.1 with a GeForce 8600M GT, and system has been updated to 10.6.2. In the past month I have started having graphic errors and color distortions on the screen which would lock the laptop up. As of last night however things have gone worse. When I first boot up I get the gray screen with logo, but when either going to OS X or BootCamp with WinXP, the screen turns black, making me think it is a hardware error. However I can hook up an external monitor to the DVI port, and the external monitor works. When I look at my system profile under Displays, it shows my external monitor, but states that my display connector has no display connected. System preferences shows only my external monitor, and the laptop behaves as though that is the only monitor - I am currently using the MBP with the external monitor to write this post. Other than the display, the laptop works as normal.
Is this behavior indicative of the GeForce 8600M GT failures, and covered by warranty/Applecare? I bought my laptop in the US with Applecare at the time, however I live in SE Asia now - while there are Apple service centers here, things aren't always quite as smooth as in the US and I want to make sure I have as much evidence on my side to push to get this fixed. Thanks.Macbook Pro 3.1, Mac OS X (10.6.2)
Currently Being ModeratedNov 13, 2009 4:58 PM (in response to jcharles01)@jcharles01
The only thing that makes me think this might not be the NVIDIA fault is that you can connect an external display OK. The NVIDIA chip, if I understand correctly, deals with all video output from the machine, so a failure of the chip should mean no video whatsoever (that was certainly the case on my laptop - no connected screen would work, I could only get in by screen-sharing the machine).
There are numerous things that could explain what you're seeing - one is a physical problem between the screen and the logic board, ie, a connection is faulty. That would certainly explain why your machine no longer sees the inbuilt screen. That's only one possible explanation though - as I've mentioned previously, really the only way you can know is for Apple to do the diagnostic. As I understand it, it's pretty clear cut - it's either the NVIDIA problem or it isn't.
Good luck!MacBook Pro 2.4 G Duo, Mac OS X (10.5.8)
Currently Being ModeratedNov 13, 2009 7:39 PM (in response to Peter Miller7)My laptop showed this issue and I took it into the Applestore and they are now changing the Logic board with no problems.
One question for you guys who have had the repair is what will happen to all my serial authorisations??? Will I have to redo all this and get all the challenge codes again because of the logic board being different.
Currently Being ModeratedNov 15, 2009 9:09 AM (in response to Ed_Lee)Hi,
After reading the trend i am now becoming more convince that my MBP is encountering the same NVIDIA issue...
I bought my unit last Feb. 2008 in canada didn't have a chance to extend the warranty and now the symptoms is manifesting...
If the NVIDIA graphics processor in your MacBook Pro has failed, or fails within three years of the original date of purchase, a repair will be done free of charge, even if your MacBook Pro is out of warranty.
does this mean that apple knew that some machine will not show these symptoms immediately but some will manifest in later years...Macbook Pro, Mac OS X (10.6.2)
Currently Being ModeratedNov 15, 2009 12:47 PM (in response to jjcostan)@jjcostan:
does this mean that apple knew that some machine will not show these symptoms immediately but some will manifest in later years...
The nature of this fault is that it is a chip failure related to substandard manufacture, so the likelihood of the chip being diagnosed before a failure is all but impossible. According to Apple:
NVIDIA publicly acknowledged a higher than normal failure rate for some of their graphics processors due to a packaging defect. At that same time, NVIDIA assured Apple that Mac computers with these graphics processors were not affected. However, after an Apple-led investigation, Apple has determined that some MacBook Pro computers with the NVIDIA GeForce 8600M GT graphics processor may be affected.
Reading between the lines, I would guess that not every machine got the bad chips, so Apple was unable to simply issue a recall of all MacBooks with NVIDIA chips. Since we know Apple is not averse to issuing recalls if necessary, we have to speculate that the only way the fault can be effectively identified is (unfortunately for everybody) via the symptoms.
This is why several commenters above have had difficulty with identification of the fault. As I understand it, the chip must actually be in failure state for the Apple service diagnostic to positively confirm that it's this problem. In my case I had a sudden and obvious failure, but a few people have reported intermittent failure.MacBook Pro 2.4 G Duo, Mac OS X (10.5.8)
Currently Being ModeratedNov 15, 2009 2:16 PM (in response to jcharles01)Hi jcharles,
As Peter hints this doesn't sound so much like the GeForce issue.
I'm guessing, but a problem with the display cabling connections seems the most likely cause of the problem to me.
Your AppleCare should still cover you in Malaysia. It applies world wide on all portable Apple products.
RodMBP 13"2.26, MBP15"2.2, iMacG520"RevB , MB2CD, MBCD, ,PM5400/180 & earlier, Mac OS X (10.6.2), 7 chooks, 2 dogs, 2 daughters, 1 pear tree, 0 partridges, itinerant bats, magpie
Currently Being ModeratedNov 16, 2009 12:24 AM (in response to jcharles01)Charles,
You're not alone in this. The display on my macbook pro began to go blank a few months ago. I know that the display is not recieving a signal since the backlight is on, but no image is present. The external monitor does work, and according to Apple who refused to repair the unit, claimed that it's obviously a loose cable. Don't let them lie to you... I was able to prove that it's not a loose cable. I video taped myself demonstrating that the connections are fine. I transplanted my friends display into mine and vice versa, and guess what happened. My display worked perfectly on his, however his either did not work on mine or show video corruption. This demonstrates that the connections are obviously working, however the video adapter must have some kind of defect related to this NVidia issue. Also, this problem appears to happen more often when the laptop gets hot. The funny part is that NVidia knew that because of the defect, heat would affect these faulty processors much more than usual. As a result, NVidia released 'patched' firmware that would alter the way the fans operate on our MacBooks. They made it so the fan switches on much sooner (lower temperature) than they did before. However, this obviously does not resolve all these issues. Have you noticed whether or not this issue is temperature related for you as well?
If anyone else is having this kind of issue and has been denied repair by Apple, drop me a line. Please include Apples reason for refusing to repair your equipment and your symptoms.macbook pro, Mac OS X (10.6)
Currently Being ModeratedNov 16, 2009 3:43 PM (in response to goraventech)Just wanted to let you now that I have the same problem with BlackScreen. But... I just made a clean install of Snow Leopard (upgrade disc), and it seems to work even after 5 reeboots...Several, Mac OS X (10.6.2)
Currently Being ModeratedNov 17, 2009 6:09 PM (in response to goraventech)Goraventech,
I believe I did have issues before with heat interfering with the laptop. A couple of months ago I had problems with the laptop starting to show massive amounts of display glitches, that would lead to a locked computer. Rebooting would cause a kernel panic. If I left the laptop alone for a bit to cool to ambient, it would start to work again. I since moved to a better setup for cooling and was more aggressive with fan controls, and didn't have further issues until recently. I can't say if this was related to the video card or not though, or if it was more of a case of general heat issues. I did note the GPU was always running quite hot then though, at least 10 C above the CPU.
I would agree that it is a connector issue based on being able to see the DVI output, but I do get the grey boot screen, and can even view to select which drive to boot from. Once I do select a drive though, whether OS X, Bootcamp, CD, or USB, it goes black and only DVI works. Furthermore this all started when I was rebooting after the Safari update - since I have an external keyboard/mouse I didn't even touch the laptop for something to jiggle loose. Just seems odd for it to be an intermittent cable issue, whereas it does seem possible that it is a problem with the video card, either hardware or firmware. Unless only part of the cable is damaged?
I have since delivered the laptop to the local service center, and should get it back next week under Applecare. I'll give updates if I can find out what the issue was, whether general logic board fault, cabling, or video card. Thanks all for the comments and suggestions.Macbook Pro, Mac OS X (10.6.2)
Currently Being ModeratedNov 18, 2009 5:00 AM (in response to Peter Miller7)Hi peter,
I just ran aht and the error detected is the video controller. Does this mean i am one of the mbp affected user?
jeromeMacbook Pro, Mac OS X (10.6.2)
Currently Being ModeratedNov 18, 2009 12:18 PM (in response to jjcostan)@jjcostan:
I just ran aht and the error detected is the video controller. Does this mean i am one of the mbp affected user?
I don't think you can tell just by running the aht. There appears to be a specific diagnostic that must be run for this problem. I was there when they looked at my machine, and they plugged a little silver box into the USB port and booted the machine. After a few minutes the machine shut down and they plugged the box into another Mac and read off a whole lot of data.
I guess the fact that the aht shows it's a video controller problem points in the right direction, but there can be numerous things go wrong with the video path, so it's not an indication necessarily of this particular fault.
(FWIW, the Apple guy who serviced my machine told me that if the chip itself was showing problems and it was an NVIDIA chip of that issue, they'd replace the board no matter what kind of a problem was exhibited. So if your machine is eligible, and the chip is broken for whatever reason, it is my guess that it will almost certainly get fixed under the warranty extension)MacBook Pro 2.4 G Duo, Mac OS X (10.5.8)
Currently Being ModeratedNov 20, 2009 8:25 AM (in response to Brett L)Another one bites the dust...
Late 2007 MacBook Pro, 2.2GHz, Snow Leopard. Got the black screen issue while on a recent road trip. On the drive back, I spoke to Apple support, who directed me to remove the battery, reinstall it, then zap the PRAM. No joy, so I'll ship it back to Apple for the fix. (They got a box to me overnight. Big Plus for Apple.)
I have noted that the black screen occurs when I first boot up. If I let the boot cycle run to the end (I assume), then turn the MBP off by holding the power button, then start up again, I can get the screen back... sometimes I have to do this more than once. But, I have been able to get the screen back rather reliably using this technique, but I never know when it will be the last time. I also hate doing a hard power down.
After the "remote diagnostic", Apple assured me that it would be fixed for free. They noted that I am still under Apple Care, although they could've mentioned that it wouldn't have mattered.
I'll update when I get the unit back. Now... on to backups.MacBook Pro 2.2GHz, Mac OS X (10.6)