Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
This part is easy actually - although you have plugged the keyboard back in correctly, you've probaby not plugged the keyboard backlight in again correctly. It is located just up and left of where the keyboard cable comes throught the topcase (here). I forgot to thread the little cable through first time I reassembled a keyboard/topcase assembly and had the same problem...

Wait, I thought F9 and F10 will always show that on the screen unless the room is dark enough for the backlit keyboard to turn on? Try it in a dark room, maybe its not dark enough to even activate the backlit keys?
 
The rightside of the backlights of my keyboard do not work anymore. Could be caused by a little bit beer. Is there a trick to fix this, or do I need a new keyboard?
 
yea i understand, is it possible that there is still some moisture in the keyboard and thats why it doesn't want to function? Because the keyboard it self doesn't have any logic boards or anything to fry really right?

The keyboard is delicate system of circuitry; nothing to really fry, but a lot to short.

You need a new keyboard and keep those liquids away!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.