Chosen Solution
Hi, I have an issue with my Macbook (White, 13-inch, mid-2009, s/n 45921FT09GU) where the backlight on the LCD randomly turns off while I’m using the laptop. I can tell the screen is still working because if I look closely in a certain light I can see the info on the screen and operate (just not very efficiently). If I flex the screen, or move it up and down, it DOES NOT cause the backlight to flicker or come on or go off. It goes off randomly. I’ve plugged in an external monitor for now, turning my laptop into a desktop. I brought a new inverter but that has NOT solved the problem. The next thing I think I will try is to replace the inverter cable. Of note however: I find that if I unplug the inverter cable from the inverter, and then replug them, the backlight comes back on again for a while (a random amount of time from 1second to 5 hours or more!). Could this give me a clue as to what the problem is? I’m hoping it is not the LCD or logic board. Any help appreciated. Regards Shanon
Shanon, it is possible that this may be caused by your logic board, yet it is on the lower end of likelihood. I would replace the inverter cable next. If that does not get you the needed result, you may have CCFL’s (light bulbs) within your LCD display that are going bad, replace the display. Lastly, I could be the logic board. But there should be work-arounds and to supply the inverter with needed continuous power. This would be some pretty advanced technique but it should be possible. Of course, this will depend on your comfort and skill level. Hope this helps, good luck.
Have you tried resetting PRAM? (Command Option P R at startup and then wait for multiple charm on sounds)
Anyone come up with a fix for this? I’m having EXACTLY the same problem. Replaced inverter and cable, still random black screen, that lights up for a while when reconnected.
