Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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Screen works perfect, but no backlight?

hi everyone I had a light spill on my macbook pro and it barely touched the logic board. It works flawless on external, but only problem is that the backlight is gone? i can see screen working with a light behind display. How do i fix this? Is the backlight controlled by the LVDS cable or what? the screen looks perfect just no backlight.... please help me

Answered! View the answer I have this problem too

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It might be the inverter. LCD inverters take the incoming DC power and invert it to higher-voltage AC power to the tubes to light the screen. Macbook is LED so no tubes I guess but it still has an inverter. My inverter went bad and had the same symptoms. I might be completely wrong, but thought it might be worth passing along the information. weather or not it's possible to damage this part from what happened to your machine, I don't know. I do know apple usually just goes ahead and replaces the entire screen when done under warranty for this problem.(which means it's probably pretty deep inside the display assembly I guess).

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Sounds to me like you have a WLED driver that is bad. It is a chip soldered directly to the logic board. Also a alternative is a fuse that is located near the same component. Both these require soldering tools and a steady hand. There are many write ups on here referring to your problem.

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Please note there is NOT a inverter on this model.


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kris will be eternally grateful.
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