Samsung r510 laptop keyboard not functioning properley

I guess you mean the keyboard function act as though the fn key is always being pressed? If so this is likely to be a hardware problem. Look at gently prying up the key (most keys are press fit and can be removed, lift it off as level as you can, should be relatively easy but don't force it!) once off try moving the rubber pad below the key with a small blunt instrument, keep testing other keys while doing it to see if the fn effect ever lifts of, may have got wet or something underneath the key.

NUMBER LOCK
You have press the NumLk key (number lock) and this changes the right hand keys to a number pad.
Press the NumLk key (also doubles as the ScrLk key to toggle the Number lock). it is near the F12 function key. When the NumLk has been enabled a LED light is turn on to indicate this function has been selected. Press the NumLk key again to turn off the Number Lock and Num Lock LED indicator.

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.

HP laptops have the ability to lock the blue special function keys on, making numerical data entry easier on laptop models that do not have the room for dedicated numerical keypads. Because the key combination to lock the function keys is so simple, however, it is easy for those who wouldn't normally use this ability to do so accidentally. When the function keys are locked, pressing certain keys will result in numbers being typed rather than letters. Unlock the function keys to alleviate this issue.

Press the "Fn" and "Num Lk" keys on the keyboard simultaneously. The "Number Lock" indicator light should turn off, indicating that the letter keys will once again type letters when pressed. This combination should work on the majority of recent HP laptops. If it does not, try one of the alternate key combinations in this article's remaining steps. Press the "Fn" and "F11" keys simultaneously, then attempt to type a letter. If the combination does not work, continue to the next step. Press the "Fn" and "Scroll Lock" keys simultaneously, then attempt to type a letter. Continue to the next step if this does not work. Press the "Fn," "Scroll Lock" and "F11" keys simultaneously.

your USB keyboard may not work because your laptop has not got to the point of initiating USB at the point of booting to password.
You could try using ascii codes to eneter the key
at the point where you need to enter the key that doesnt work press your numlock button this will turn some of your letters into numbers...they should be written on the keys in a different colur...the laptop Im looking at at the moment has 4 on U, 5 on I 6 on O, 1 on J etc...
hopefully these are not the broken key..
if you look here you will see the chart that says A=65 B=66 etc in order
http://www.asciitable.com/

find the letter you need eg v=118 in lower case
type in your password till you get to the v (if thats the broken letter)
press and hold [ALT] button with num lock on and on your newley formed number pad type in the number thet represent the letter in this case 118 when you release the [ALT] key it will insert that letter.
however this only works with an extended keypad (like a full size keyboard) where the numbers are seperate not your top row numbers which is why you need your numlock on.
HTH
Richard www.2pages.co.uk
if it does then work maybe you could go into your bios and turn USB legacy support on...which may then help your full size keyboard to work too.

Hi.

The layout of keys can differ with different model and make laptops. The keys with letters and numbers on them are used with the Num Lock key, if you press the Num Lock key them keys will type numbers instead of letters. If you press that key again they will type letters as normal.

The keys with icons on them are used with the function (Fn) key. That means that you hold down Fn and and use the F keys to adjust things like brightness, volume, mute and Wireless radio etc.

If you are wanting a full breakdown of your laptop models keyboard then i suggest you download the user manual from HP support website. Link below.



http://www8.hp.com/us/en/support-drivers.html



Regards.

Press the FN (Function)key and the NmLk (Number lock) key at the same time.

I set up my girlfriends this morning, to turn off Num Lock, you need to have the machine on and select Fn + F11.

That'll turn it off and you'll have the bliss of typing normally again!!

You probably have the function scroll button on. See the blue numbers on the letters? press function scroll to take it off and see if that is your problem.

(FuNction key) A keyboard key that works like a shift key to activate the second function on a dual-purpose key, typically found on laptops to reduce keyboard size. It is different than the function keys F1, F2, etc. It is also a real nuisance when the PageUp and PageDn keys are placed on the Up and Down Arrow keys and have to be activated by pressing the Fn key.

Hope this helps you,
George