We can solve display light problem in Nokia 1202, 1661, and 5030 by using simple trick.These mobiles have same board and same lcd light components.So we can use single method to solve lcd light problem to related model.First confirm that lcd ic perfect then try this trick.Here is a diagram for lcd light problem, observe diagram and do jumpers like diagram below.
5030 keypad light problem

Nokia 1202 Led Light Solution Ways.
Nokia 1661 Led Light Solution Ways.
Nokia 5030 Led Light Solution Ways

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