I was wondering why my keyboard looked kind of strange, this morning. Then I noticed that the keyboard lighting was turned on (strangely enough in a bright room) and that only a few keys were backlit — not all of them.
Since I had my keyboard already replaced twice (I suppose I now have the 2018 keyboard in my 2016 MB Pro) I did some research beforehand and hoped that it was some software related issue (BTT or Karabiner Elements): disabling them didn’t have any effect, though.
Then I noticed that those keys that actually were backlit had 100% brightness — I tried to reduce the brightness but no change of backlighting is noticeable, except when I go all the way to 0% to turn it off (at least that works, because the irregular lighting pattern is driving me nuts).
If all that wasn’t strange enough I noticed something else during trouble shooting: After a SMC reset, followed by a NVRAM/PRAM reset the problem persists in a weird way: now keys that lit up are dark, and some that where dark before shine bright… I did the reset dance twice and the light & dark pattern changed twice. This leads me to believe that the actual background light is not the problem (since they do light up in different combinations) — and since all keys are working quite nicely (knock on wood) I am afraid that the keyboard is also not the problem.
Now my mind runs in circles and aks: but what could it be — and how expensive will it get? Has anyone experienced this issue and knows what to do?
Any ideas for further troubleshooting are really appreciated.
Thanks in advance!