Problem with keyboard backlight only on a few keys
I unfortunately had some liquid damage on my MBP 13" 2009 keyboard. So I went ahead and watched some Youtube Videos on how to take it apart and clean it.
The problem was, the backlight only worked on some keys in the center of the keyboard. I learned that the most common reason for this is improper alignment of the backlight. After hours and hours of trying to get it to work, I decided to trash the keyboard and get a replacement, since the keys were slightly worn out as well.
I ordered the same keyboard number, installed it, but still the same problem. Every keyboard component is new and I took extra care when installing it, but no luck.
I didnt find any threads on the internet where the problem still persisted after replacing the whole keyboard with the backlight.
I also tried resetting the SMC. Here is a picture of the problem:
Any help would be very appreciated!