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My screen fades/distorts, but an external monitor works fine.

About a month ago my A1226 MBPro started acting up. The display would show symptoms similar to those seen in this video:

http://www.youtube.com/watch?v=yCceE5Ocf...

At first, varying degrees of physical manipulation of the display would fix the problem. Often just closing the screen and reopening it would remedy the problem, or wiggling the screen back and forth.

As time progressed, the issue became worse, and eventually no amount of manipulation could get the display to function correctly.

What I've done / relevant information:

1. This MBPro does have the 8600 GPU that has issues, however my logic board was replaced under warranty after this issue developed AND my laptop works perfect with an external monitor.

2. I replaced the LVDS (display cable) as most of my research pointed to it as the culprit.

Anyone have any suggestions on what I can do aside from replacing the entire display?

The only other part I can think of that I could replace is the 'led inverter board', however the backlight functions fine, so I'm not sure that will do anything.

I'm finding it harder and harder to sink big money into this barely 5 year old, $2500 laptop, that in perfect condition, can be had on eBay for about $650.

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Hi Ken,

Have you seen this video?

http://www.youtube.com/watch?v=fvxq6kPcV...

It follows the same principle that you're describing, that the laptop must heat up before the screen works properly. I'm not sure if this is a logic board, or display issue, but regardless it's extremely frustrating and problems like this shouldn't develop four years after purchasing such an expensive machine.

da

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I have the same laptop (A1226) and have had the mother board replaced twice by Apple under the extended Nvidia warranty. A few months after the last replacement I began to experience the same symptoms you describe and still have good video via an external monitor.

I found after leaving my laptop all day the video came back. It seems to work once it's been on a while and has a chance to heat up. One weekend I ran video DVD's all day and left it plugged with all the energy saving options turned off for a couple more days. It works ok now, mostly. I still have the video issue off and on but leaving it on for a while seems to bring it back.

Clearly something else is going on with this model beyond the bad Nvidia video chip.

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Hi Ken,

Have you seen this video?

http://www.youtube.com/watch?v=fvxq6kPcV...

It follows the same principle that you're describing, that the laptop must heat up before the screen works properly.

I'm not sure if this is a logic board, or display issue, but regardless it's extremely frustrating and problems like this shouldn't develop four years after purchasing such an expensive machine.

da

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Jeff - That video would be a lot funnier if I hadn't paid so much for my laptop! It is nice to know there's another technique besides waiting for it to heat up on its own. Thanks for the Youtube URL.

I wonder what's going on with these MBP's? For my second logic board replacement the Apple store sent my laptop to some repair depot and they replaced the logic board, a video cable of some sort and one of the memory chips. According to the Apple store manager this depot place was the ultimate level of the Apple repair process. They supposedly check out everything and replace anything that is remotely suspicious. Yet a few months later the problem comes back. I'm on my 8th Apple computer and this is the only one (and the most expensive) I've ever had a problem with.

Thanks again,

Ken

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Jeff sarà eternamente grato.
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