How can I tell if my logic board is defective

In the last few days my MacBook Pro (15") runs for about 10 or 15 mins then the entire screen gets jittery and freezes up solid with odd colors and patterns requiring me to force restart.

I suspect a defective logic board ($599) and think I would like to attempt the repair. But I would like to be sure it is the logic board before I try.

Another symptom is that I can start up in Safe Mode and generally runs without a problem but of course it is limited in what I can do. That sort of suggests to me maybe it is something else other than the mother board.

Anyway, there must be a diagnostic method that will isolate the problem and I hope someone can lead me down the correct path.

Except for this problem it is a beautiful day.

Update

The last three of the serial # are 1XR.

I will down load that program and let you know asap.

Thanks

Answered! View the answer I have this problem too

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Please give us the last three figures of your serial number so that we know your exact machine. Thanks

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This really sounds like the Nvidia 8600 GPU issue. We need that serial number to check it. Apple was replacing these logic boards for free but that program has run its curse and they may no longer do it. Rather than putting in a new logic board yourself, Apple does offer a "flat rate", repair that runs about $285 plus shipping and will replace the logic board for you. To test the GPU, hook it up to an external monitor and see if you get the same results.

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I am feeling incompetent with this forum. I hope I am answering these question satisfactorily. Serial # is - W88211861XR

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Apple MacBook Pro "Core 2 Duo" 2.4 15" (08) Specs

Identifiers: Early 2008 - MB133LL/A - MacBookPro4,1 - A1260 - 2198

Do the external monitor, you have the 8600 nVidia GPU. You're doing fine, really. I've repaired Apple products professionally for abut 30 years and if I use a term you don't understand please forgive me. Just ask. If you haven't heard of the nVidia 8600 issue, just do a search on this site for nvidia and you'll find it all over.

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Mayer,

Thanks for your help. You have given me hope. I have been looking for the parts and the repair guide for the replacement of the Nvidia 8600 but can find neither. I would like to do the repair myself. Can you give me some direction?

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I do not think it is a repair that you can do yourself unless you have a work station to reball the Graphics Chip. This means unsoldering the chip from the board, cleaning the chip and the board, and then resoldering the chip back to the board. There are services offered on Ebay to fix the issue or someone on here might offer that type of service as well.

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Also Apple might fix this for free. Go to a Apple store and have them check it before it fully dies. I think I read they fix the issue for free as long as the machine is less than 5 years old.

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The replacement program is still up and running.

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Anyone know if this is still something ape is doing my monitor is doing the same thing and won't boot just, gets the apple logo with the squiggly lines and random colors but then pops the little window that say you need to restart the computer but keeps doing the same thing when restart.

If have an answer or thought, my email is northernroots@me.com

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