Check if the Num lock indicator light is on or off.

When the indicator light is on, you can enter numbers.

Press the Num Lk key, or Fn+Num Lk keys, to turn the Num Lock indicator light on or off. See Parts and Controls on the Front for the location.

Check if the Caps Lock indicator light is on or off.

When the indicator light is on, characters typed will appear in uppercase (or lowercase if you also hold down the Shift key).

Press the Caps Lock key to turn the Caps Lock indicator light on or off. See Parts and Controls on the Front for the location.