Paul's trying to find out whether your keyboard is "otherwise reliable". In
other words: is the problem that Word is not responding to Command N, or is
the problem that Word is not GETTING the Command N?
If it's not "getting" the Command N, could it be that the Keyboard is not
sending it, or that the command is being directed somewhere else instead.
Various things will intercept commands -- dialog boxes, and other
applications.
For example: Command N routinely fails if the Compatibility Report dialog is
open and you have clicked in it. But if the Compatibility Report dialog is
open but you have clicked in the Document, Command N will work.
Here's a test: When Command + N fails, can you type the letter N in your
document? If you can, it's not the keyboard that's causing the problem.
Hope this helps