Fixing MacBook Pro Keyboard Backlight
So recently the keyboard backlight on my Mid 2014 15″ Retina MacBook Pro (A1398) died. I didn’t drop it and it wasn’t exposed to liquid, it just stopped working. If I press F5/F6 to change the brightness the overlay shows up as if it were changing, but the keyboard stays dark. The option to adjust the keyboard based on ambient light is off.
I’ve tried resetting the SMC (and the NVRAM although I knew that probably wouldn’t help). I’ve also tried booting into the recovery partition to see if the backlight works there (it doesn’t), but I’m not sure if it’s meant to work in the recovery partition in the first place.
At this point I’m fairly sure it’s a hardware issue and I’m hoping the backlight connector simply came off the logic board. There’s no warranty on this thing, obviously, and I’ve opened MacBooks before, so I’m comfortable opening it to take a look. I was just wondering if someone has experience fixing this issue and has any advice before I start. Specifically I’d be interested to know where the keyboard backlight connector is located. I’m guessing it’s probably on the top side of the board, closer to the keyboard, meaning getting to it would mean removing the logic board. Is this assumption correct? I’ve torn down (and put back together) MacBooks before, but I probably wouldn’t bother with such invasive surgery just to fix the keyboard backlight, considering I don’t really need it anyway…
EDIT: Okay, I got impatient and decided to just take a look. Turns out my hunch was right and the connector had simply popped off the board ([pic](https://i.imgur.com/xkzl21X.jpg)). Luckily it’s accessible by simply removing the bottom, so no logic board removal required. Another thing I noticed was that one of the screws that is meant to hold the logic board was loose inside the case (also visible in the pic) and one was missing entirely. The last person to open up the machine was an Apple Tech, but I guess it’s possible the screws somehow came loose. I’ll probably just ask for a replacement screw next time I’m at the Apple Store.