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13" aluminum unibody, 2.0 or 2.4 GHz Core 2 Duo processor.

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Why is the screen flickering and turning black?

Five month after i bought it, the screen starting flickering like in the video posted here (http://www.youtube.com/watch?v=FhDMnHqB3...) and then it turns black or very dark, Things that i tried:

1- Restarting (didn't work)

2- Tilting the screen (didn't work)

3- Resetting the PRAM (didn't work)

4- Repaired Permissions (didn't Work)

5- Opening in Safe Mode (Worked) -

So i thought it was a software problem not a hardware one, and after reading a lot of forums i narrowed it down to a version bug, so i replaced the system with the original version that came with it (10.5.5)

It worked fine for a couple of months and recently the problem occurred again but this time the safe mode trick didn't work and there is no flickering screen just black. (The system was working fine while the black screen was on )

So i think it was a hardware problem all along but i can't figure out why the safe mode solved the problem temporarily.

Also in order to make sure the Graphic card is working fine, i connected the MacBook during the recent black screen error to an external screen and it worked fine.

So if anyone knows what the problem might be please tell me ?

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It sounds like this is a hardware issue, but I'm not sure why the safe mode trick would have worked. It sounds most likely like your display data cable and/or back light may be malfunctioning.

Try shining a flashlight at the screen while its on and see if you can catch even the faintest image (this may be easier if you can manage to open the start menu or something and try to see if you can see it opening with the flashlight pointed there). If you can, that sounds more like a back light issue. We don't have guides for replacing the inverter for this model, however.

This guide will get you into the display, and you should be able to check to make sure the display data cable looks intact and connected. It shouldn't be hard to take out the inverter with this guide either, even if the steps aren't shown.

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nader Haggar будет вечно благодарен.
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