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My MacBook it runs but the screen stay totaly black

I was tightening the screws Clutch Hinge and when turned on my mac it worked but the screen was black

Update

thank youn, for your response.

But , I done what you say and nothing.The symptoms my macbook pro A1211 are:

-When you start the machine screen was black.

-There no startup sound;

-There no sensor's or caps lock light;

-The cooler and HDD work;

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Kits de Reparación de Android

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Kits de Reparación de Android

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Solución elegida

To ensure the VGU (VGC) is working connect to an external monitor... if there's no image their either you have a logic board problem. If you pinched/cut/shorted either the inverter or data cable it could be the fault. Disassemble use a magnifying glass to look for cuts or burn marks to cables... using some insulating tape or silicone you might be able to resurrect a nicked cable... otherwise replacement will be needed.

Good Luck,

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failure can be video card but is on the logic board change,You try to see if that computer is compatible with Apple program on this problem

Here the link to Apple

http://support.apple.com/kb/TS2377?viewl...

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RTFP : as of Dec 7th 2012, it is unlikely products qualify for this extended repair coverage.

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