What is the full form of FN in the keyboard of acer.

On a laptop, the "Num Lock" key has a function slightly different than the one it performs on full-d desktop keyboards. Activating "Num Lock" on a laptop usually transforms a set of central keys, including many letters, into number keys, allowing typists used to entering numbers on a keypad to type efficiently. While on desktop keyboards "Num Lock" usually has a dedicated key, on laptops it often shares a key with another function on MacBooks, for example, it shares the "F6" key and you must hold down the "Shift" or "Fn" key to activate it.

Look for the "Num Lock" key on your laptop's keyboard. This is usually near the top of the keyboard. If the key says nothing on it except "Num Lock" if that's the only function the key performs you can just press it to activate the lock; a light will probably go on somewhere to indicate that "Num Lock" is on. If the key has multiple functions, you'll have to hold down a different key while pressing it. Hold down "Shift" and press "Num Lock" if the writing saying "Num Lock" appears above some other writing on the key, the way various symbols appear above the numbers on the keyboard's number row. Hold down "Fn" and press "Num Lock" if the writing saying "Num Lock" appears in a different color often light blue that's shared by the "Fn" key.

Press your FN key.
If you look at your Keyboard on a laptop you'll see that certain keys have more than 1 symbol on them.
The FN key brings these secondary symbols to life as live keys and pressing it again will restore original function to the keyboard.

It's either a Shift+ the key with the character you want to print or an FN(The Fn Key)+ the key that has the character you want to print. This assumes your drivers for that keyboard are actually loaded in the OS you are using and the OS recognizes the special keys. These are not normal keys.

Hi,

Fn key is bottom left of keyboard, volume keys (up and down arrows) are bottom right.

restart manually your laptop by pressing power on/off mode

I have a sneaking suspicion that your NumLock is turned on.

On laptops that don't have a num-pad on the side of it (like full keyboards), a function key is used to map a numpad ontop of the following keys; 7,8,9,0,u,i,o,p,j,k,l,; and so on.

Note: the numlock key itself may be a part of another key, which you can access by holding the Fn key.

This should let you type as usual.

Good Luck!

Laptops have a Fn key in the lower left side, next to the CTRL key. Says Fn on it.
Desktops don't have a Fn key. They have special function keys along the top numbered F1 through F12.
The windows key is the one you find on desktops, and on laptops, in the same place, the key says Fn. They are not the same.

Look on the Function keys on the keyboard (the F1 through F12 keys) Do you see a wireless icon on one of the keys? If you do, then look for a Function (Fn) key on the keyboard. Press and hold Fn, while holding Fn, press the funtion key with the wireless icon (example: the wireless icon is on the F2 key; press and hold the Fn key, while holding the Fn key, press F2, release both keys).

Sounds like you need the keyboard replaced...

usually this means you are having a critical keyboard error. if its still under warentee then take it back but if not then just look for another keyboard for that model on ebay.
should be able to get one for no more than £20.00
matt