Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB DDR5 Video RAM

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Black screen after fan clean


I have recently buy a macbook pro but he is hot and i want to clean the fan.

I forget disconnect the battery and a screw drop on logic board and little spark.

After i boot i have just the sound of boot and a black screen

Sorry for my bad english i'm french.

The logic board is 820-3330

I need your help

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Sounds like you killed the logic board ;-{

Only hope here is getting a replacement logic board.

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A fuse or other can be open ?


Did you try an external monitor to make sure the video was working?


I don't have the connector but with a lamp, i see nothing on screen ...


When I hear sparks it means the high voltage went into the low voltage part of the logic board. While it maybe possible for someone to fix the logic board you need to have the schematics and board layouts and a very good understanding on how the logic works and the needed tools. At one point I could do it but over the years its gotten to small for my eyes and much more complex. In the long haul it will be cheaper replacing the logic board.


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rwis will be eternally grateful.
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