Numeric pad will not function as a numeric pad

[LearninToFly]

Since installing Linux lite the numeric pad has acted only as a mouse pointer. I have a HP keyboard on my Dell 4550, but the HP keyboard model number: KB-0630 is not listed the Settings/Keyboard/Keyboard model. It makes no difference if the Number Lock is on or off the number pad will not type a number, it will only use the arrow keys to move the cursor. Please help me to find the settings to change my numeric pad into a true numeric pad.

[Scott(0)]

Hi LearninToFly.

Is the Scroll-Lock key on? If so see if you can turn it off. It may be labelled ScrLk or something similar.

[LearninToFly]

Scroll lock is not on as far as I can tell. The keyboard you have there looks exactly like mine. (Please tell me what your /system/keyboard/keyboard model setting is) Mine is set for a Dell SK-8125 at present. (trying to find a setting that was compatible)
  The reason for saying "as far as I can tell" is that the scroll lock light AND/OR button is not working.