Keyboard letters 'm,j,k,l,u,i,o' permanantly locked for numerals. i have no idea how i switched this function on.

NumLock is on. Look for the Fn key in the lower left corner, and lookint in the top right, the NumLock key.

This worked on my Dell Latitude

There are F key for toggleing and locking in the Numeric keypad that doubles as your alpha numeric board needs to be released. This is usually a combination of keys which share a similar color.


4 Using the keypads
The computer has an embedded numeric keypad and also supports an optional external numeric keypad
or an optional external keyboard that includes a numeric keypad.
Component Description
(1) fn key Executes frequently used system functions when pressed in
combination with a function key or the esc key.
(2) Embedded numeric keypad Can be used like the keys on an external numeric keypad.
(3) num lk key Enables the embedded numeric keypad when pressed in
combination with the fn key.
8 Chapter 4 Using the keypads
Using the embedded numeric keypad
The 15 keys of the embedded numeric keypad can be used like the keys on an external keypad. When
the embedded numeric keypad is turned on, each key on the keypad performs the function indicated by
the icon in the upper-right corner of the key.
Enabling and disabling the embedded numeric keypad
Press fn+num lk to enable the embedded numeric keypad. Press fn+num lk again to return the keys to
their standard keyboard functions.
NOTE: The embedded numeric keypad will not function while an external keyboard or numeric keypad
is connected to the computer.
Switching key functions on the embedded numeric keypad
You can temporarily alternate the functions of keys on the embedded numeric keypad between their
standard keyboard functions and their keypad functions by using the fn key or the fn+shift key
combination.
● To change the function of a keypad key to keypad functions while the keypad is off, press and hold
the fn key while pressing the keypad key.
● To use the keypad keys temporarily as standard keys while the keypad is on:
◦ Press and hold the fn key to type in lowercase.
◦ Press and hold fn+shift to type in uppercase.
Using an optional external numeric keypad
Keys on most external numeric keypads function differently according to whether num lock is on or off.
(Num lock is turned off at the factory.) For example:
● When num lock is on, most keypad keys type numbers.
● When num lock is off, most keypad keys function like the arrow, page up, or page down keys.
To turn num lock on or off on an external keypad as you work:
▲ Press the num lk key on the external keypad, not on the computer.


This is from HP's documentation, but it is similar to my Toshiba

Peace,

-t

Press ''Fn'' key and NunLK key at same time.

If you are getting numbers when hitting letters on the 2133 you need to press shift+fn+num lk simutaneously and this will turn off number lock and make your letter keys work again.