I've heard of several people who've had problems with the OSD (on screen display) on their Thinkpads. Well, I was having this same problem on my Lenovo X200 tablet (running Vista), so I created a new user profile to see if that would fix the problem. Voila! Problem solved! Now I have to go through and re-customize everything, but it's worth it if I can have the OSD working.
If your OSD isn't working, try that. Create a new profile and see if that fixes things.