I have an extended keyboard on a MacBook pro and the number pad won't work. letters all work. num pad works fine everywhere else - word, safari, etc. just not in excel. a wireless Targus keypad suddenly doesn't work anymore either. targus says it never should have worked but it did for a few years. now nothing. there is no num lock on the keyboard and I tried all the 'f' keys. f14 is the scroll lock but no num lock.