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Sorti en juin 2012, modèle A1278. Processeur Intel avec Turbo Boost, jusqu'à 512 Mo de RAM vidéo DDR5

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LCD display works, but brightness/backlight is dim

I just purchased a used MacBook Pro (13-inch, mid 2012). NON-retina display. Everything works fine, but the LCD screen seems a bit dimmer than it should. When I turn the screen up to full brightness, it doesn't seem very bright. When brightness settings are turned down low, the screen is nearly black. Everything seems to display okay, and the colors are fine. I calibrate the monitor with a Spyder 4 Elite, and the color rendering is acceptable.

Wondering if replacing the backlight would solve the problem? If so, is it possible to replace the backlight only, or would I replace the whole LCD? If it's the LCD, would I need to replace the entire LCD assembly or just the LCD panel. (I think these LCD panels have integrated backlights, but I'm wondering how to tell if the problem is in the backlight or somewhere else in the computer/display assembly.)

Other relevant tech specs:

Mac OS Sierra 10.12.6

Processor 2.5 GHz Intel Core i5

Memory 4GB

Graphics Intel HD Graphics 4000 1536 MB

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Hey Charles,

To me the problem sounds more in the backlight circuit that drives your backlight screen and not the screen itself. (Most of the time this is because you spilled some liquid a while back or something). (most of the time the screen goes completely black).

Get it to a repairshop that does microsoldering on macbooks, it should be a problem they can fix.

if you have any questions, let me know

Kind regards,


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Thanks. Would this fix require new parts? Any idea of how much something like this would cost?


Hey Charles,

Assuming this is the problem, the cost of the parts is minimal but the labour hours are extensive and needs to be performed by someone with some skills. Think around $200 for the repair.

Kind regards,



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