A user calls the help center complaining that her laptop keyboard is malfunctioning, outputting numbers rather than letters for certain keys. What is the most likely problem?
Explanation
Answer: C - The user has accidentally pressed the Num Lk key, resulting in some keyboard letters being replaced by numbers.
Key Takeaway: The Num Lk (or number lock) key turns a portion of the laptop keyboard into a number keypad (which is located on the right side of a standard, full-size keyboard). As a result, letter keys are replaced by numbers, which can seem like a malfunctioning keyboard to the less experienced user. Upon further inspection the keyboard may be damaged (answer choice A), but this is not the most likely solution and the inverter board (answer choice B) is related to the laptop’s display. While the Fn (function) key enables secondary functions of other keys, it must be held down to operate unlike the Num Lk key, which needs to only be pressed once to activate.
