Certain keys stopped working even after replacing the keyboard.

This model has no numlock as it has no keypad. It looks like a faulty keyboard as the linked keys appear to be in the same column in the keyboard grid. You could try Fn+F11 as this solves certain other keyboard problems with symbols etc. Otherwise could be a new keyboard required.

Laptop keyboards do deteriorate from time to time. Once any key stops working, it is time for a replacement. Doing so is not difficult. Simply undo the case screws and gently separate the case to expose the keyboard. The keyboard floats inside and lays in the main board. Lift gently and pull out the small flat wire connection. The keyboard slides out and replace with a new board. Place flat cable in port on the main board, lay keyboard on top of chassis, close the top/bottom of case, tighten screws and all done. Go on line for Keyboards.

As the name implies, a keyboard is basically a board of keys. Along with the mouse, the keyboard is one of the primary input devices used with a computer. The keyboard's design comes from the original typewriter keyboards, which arranged letters and numbers in a way that prevented the type-bars from getting jammed when typing quickly. This keyboard layout is known as the QWERTY design, which gets its name from the first six letters across in the upper-left-hand corner of the keyboard.

While the design of computer keyboards may have come from typewriters, today's keyboards have many other keys as well. Modifier keys, such as Control, Alt/Option, and Command (Mac) or the Windows key (Windows) can be used in conjunction with other keys as "shortcuts" to perform certain operations. For example, pressing Command-S (Mac), or Control-S (Windows) typically saves a document or project you are working on. Most of today's computer keyboards also have a row of function keys (F1 through F16) along the top of the keyboard, arrow keys arranged in an upside-down T, and a numeric keypad on the right-hand side. Some keyboards have even more buttons, allowing you to change the system volume, eject a CD, or open programs such as your e-mail or Web browser.

Replace the keyboard, most are easy to find on EBay for less than $40

Try another keyboard. If the problem is fixed then get a new one. They are really cheap now a days.

Make sure the left arrow key on the keyboard isn't stuck and then type. I suggest trying a new keyboard as well if that doesn't work- also pull off the left arrow cap entirely on the num pad and directional keys. If that doesn't work also try replacing the mouse in case it has a special button that is stuck.

May be a defective keyboard replace.RICHARDM69

Is this a laptop? Some laptops will allow you to use these keys as the number pad/arrow pad as well in a certain mode. You will likely be able to turn off with a combination of the FN key plus one of keys F1-F12 (the function key will perform the action shown as a symbol on these keys).

If none of the symbols seems to indicate this mode. Try each combination and test to see which combination sets your keyboard mode back to normal.

The keyboard you purchased (39T0704) is a US English keyboard. Change your input local in your "Keyboard" "Control Panel" to "EN English (United States)" and all your keys should work. As far as getting the English keyboard to work in German or Polish is very unlikely.

check you keyboard in Regional settings and see that it is set to a 101 type (US or Aust) otherwise key location can change,also are you talking about Shift Keys or the Up/Down, Left/Right scroll arrows, let me know, otherwise something has gone arye on the keyboard itself.