Scantronic 9651 keypad problem?

Think I might have pressed the wrong button on the keypad and have now got no blips when pressing any key. The alarm system still works ok so how do I restore the blips on the keypad.
Les, March 2016


done
The yellow light is on what do I need to do to solve the problem thanks.

Jimmy, December 2016
Yes the keypad it lit

Les, March 2016
is the keypad lit ?

gts, March 2016
It still takes the code to set the alarm and reads right and works as it should . but the keys do not blip when I press them.

Les, March 2016
what does the keypad say?

gts, March 2016
link Click here to see other fixes for Scantronic 9651.