The O key has come off my laptop, its broken underneath where can i get?

Check out this link...

http://www.laptoprepair101.com/laptop/2007/03/20/key-fell-off-keyboard/

If it's really broken make a temporary repair by replacing "o" with a seldom used key - say }] or the right hand Ctrl key for instance.

Good luck...

Peccavi
November 2009