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Origineel bericht door: Paul ,

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I have two MBP Unibody LED LCD laptops with no back light. I have replaced with known good display and cable and still no backlight.  External works fine. Image is on LCD but darkly with no back light. I wish someone would come up with a more productive answer so I can move on with this problem. If we could get some kind of schematic we could test for proper power to LEDs . Note  Remember, leds are Light Emitting Diodes. They only light up when current goes one way.  If power goes the other way it won't light up.

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