Nokia 110 Keypad 1,4,7,* is not working solution
If Nokia 110 keypad is not working you can solve keypad problem in nokia 110 by following these steps that are given in in this post. Look at the diagram bellow and follow these steps.
Keep in mind after dis assembly of Nokia 110 look at the whole mother board for carbon water damages and rust. Make it clean with electronics cleaner and apply heat so that it can be dry smoothly. Do not apply much heat because much heat can harm your skin and may can damage the mother board.
In above diagram you can see a resistance is identified. Remove it and it will solve keypad problem if keys are working duplicate. Nokia 110 keypad problem solution.