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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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Could a faulty LVDS cable cause no backlight?

I've recently replaced my laptop logic board as there was a number of issues with the early 2015 MacBook like keyboard backlight not working and fans running full speed, but the main reason being the backlight not working. I can see the LCD working when I shine a flashlight through it and works with an external display.

After logic board replacement, the laptop nearly works fine except for the display backlight.

Could a faulty LVDS cable be a possible issue?

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After disconnecting the battery, disconnect the display cable (its not LVDS in the retinas - now using eDP/iDP signaling, just call it what it is). Take a picture of the cable end so we can see the gold contacts and post it here for us to see Adding images to an existing question

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Yes it can, the power for the backlight runs through the eDP/iDP cable. I’ll say it’s pretty uncommon, but it’s possible. Since you already replaced the logic board, the only other possibilities is the eDP/iDP cable or the backlight itself and the eDP/iDP is a lot less expensive to replace than the screen assembly.

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Update! Turns out it was a faulty eDP/iDP cable. Swapped it out and tada! Works perfectly now. Phewww saved!!!

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