My logitech di-novo keyboard has stopped working. Have put in NEW batteries-went to a store and bought brand new just in case... Was working up until yesterday, same comp, same drivers etc. Hasn't been smashed around or anything. Caps lock key's light doesn't work. Power light is STILL working and it will register the keyboard is there in the system preferences logitech customising software with "Unknown" battery life/ Wondering if anyone else has had a similar problem, or if I should just contact logitech support... (need to check warranty...) Any help would be much appreciated as i otherwise love this keyboard!!!