Chosen Solution
I got an old 15” 2012 Unibody MacBook Pro on craigslist. It’s having a weird issue with the keyboard backlight. I uploaded photos to make the problem more clear. The backlight seems to light up across the whole board, but it only shines through the F7, 7, Y, H, B, and N keys. Can I fix this by taking it apart and realigning the backlight with the keys, or is the problem a mismatched original/3rd party backlight/keyboard?
The unevenness is either burn’t out LED’s or the backlight assembly is damaged. There is no shifting issue, its possible someone replaced either the keyboard or backlight assembly with a bad or incorrect unit. Here’s the needed parts: Unibody MacBook Pro 15" Backlight - SunrexMacBook Pro 15" Unibody (Mid 2009-Mid 2012) Keyboard Here’s the guide to get to the keyboard MacBook Pro 15" Unibody Mid 2012 Upper Case Replacement you only need to go to Step 35. Then carefully lift the plastic sheet off to expose the backlight plate and then the screws which holds the keyboard if it also needs replacing.
