Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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Display backlight turns off after a couple minutes

My MBP is working greatly. However, after a couple minutes using it, the display backlight turns off. I've connected the MBP to a TV, its working. I even put a light behind the display and I can see that it is working properly, it is just the display backlight that turns off by itself after a couple minutes. What can I do? Thanks.

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This model does not use an inverter. Inverters are used on CCFL backlights. The LCD on your computer is a LED backlight. It has an LED driver circuit on the logic board. I'd be more concerned with the LED driver than with the LCD. The whole issue sounds like a backlight issue not an LCD issue

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First, try resetting your PRAM by holding CMD-OPTION-R-P on boot until you hear a second chime. If this does not change anything, it may very well be a hardware issue. Let us know the results of the PRAM reset and we will be able to troubleshoot further.

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First of all, thank you very much. No, it didnt work :( at first, I said it works properly everytime I turn on the mbp, then, after a few minutes it stops working. However, thats not accurate. Actually, once the light turns off, it takes some time to turn on again. It doesnt work everytime i turn the mbp on. I mean, it works sometimes, sometimes it doesnt. I tried what you told me to do, but nothing changed. :(

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When it happens, does the screen flicker if you move the monitor? What about when the screen is on?

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No, moving the monitor doesnt affect anything. Neither when its on or off. Do you think it could be a problem in the logic board? A guy who works at the apple store told me that if i buy a new onec the problem will be solved. However, Im not sure about that. In addittion, a new logic board is pretty expensive. I Dont know whay to do

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I also put a light behind the screen, and I can see everything working just fine. But i cant hold a light behind my mbp forever lol ... I dont know what to do man.

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Well, it could very well be a bad LCD display. Other people have had similar problems due to the inverter going bad in the LCD display. The part is here and the guide for replacement is here.

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Henrique will be eternally grateful.
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