few keys of keyboard are not responding

http://support.apple.com/kb/TS1381

Best.

What liquid did you spill on the keyboard?

i'm with the same problem , the funn thing is that not workinkg the sequency for me 6yhn

I have the same exact issue... The 6,y,h,n keys stopped working.

My g,h,j,k,l, keys stopped working just this morning. I'm using my wife's Mac. Never had any liquid near my computer. A major inconvenience since I'm writing my dissertation.

I have this same issue. Operating system 10.6.8. The keys 7,u,m,; among others stop working. They will start on their own. Nothing seems to correct the problem. I feel that it is a software problem not a hardware. I did all of the reset; press num lock; change repeat key, restart, etc., etc. It is not particular program dependent either. It will occur with any program running. As mysteriously as the keys stop functioning, they begin functioning again. As with others it is really annoying and does have to be addressed.

Never any thing spilled on keyboard either. It is not the hardware. that much I am convinced of.

My daughter's macbook air has had this problem. Somehow, she manages to enable mouse keys and then it stays enabled and she can't log back in. The article http://support.apple.com/kb/TS1381 doesn't address how to disable mouse keys when you can't log in because mouse keys are enabled! Hitting the option key five times does not seem to work when you are not logged in.

Here is how we solved the problem and I hope this helps someone else. We took a USB keyboard off a desktop computer and plugged it in to the macbook air. This keyboard worked fine and we were able to type the password to log in.

Once logged in, we then did system preferences-->universal access-->mouse and discovered that the box was checked next to "press the option key five times to turn mouse keys on and off." We unchecked the box--problem solved.

I don't know how she managed to check that box, but once checked, leaning on the option key must turn on mouse keys. Then, she walks away from the computer and has to wake it and log in and she can't (until her mother remembers the trick about using a USB keyboard!).

I have the same issue with a mid 2011 MBAir. Mine started last week with the number 5 key. It just wouldnt work. Then a couple of days later, pressing the 4 key typed 45 and all of a sudden 5 worked again but pressing it also typed 45. The next day R and T followed suit with both typing rt when you pressed either, and within an hour f and g (typing fg for either) and then v and b (typing vb for either) joined in. So a straight diagonal line from 45 through RT and FG to VB within a couple of days. So I checked further and the two Function keys, f4 (launchpad) and f5 (lower screen brightness), which are above the 4 and 5 key, also behave the same (pressing either will dim the screen and also show the launchpad).

So the problem seeped from the top of my keyboard to the bottom.

I had to get the keyboard replaced. It works well now.

Well done. I am not that clever and went to Apple and a day later I had a new keyboard. Works fine 🙂

How much did it cost? I don't have cover so I wanted to explore all other avenues before dishing out a lot of $ for a new keyboard to be fitted.

Exact same keys not woring for me. But randomly.

Thank you, after calling apple support and reinstalling OSX still nothing fixed the problem of half of the key board buttons not responding, even apple tech support couldn't or DIDNT advise me on the Options key press five times.

Options key press five times fixed my issue, thank you so much