Keep in mind after dis assembly of Nokia 1616 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.
Remove three legs Divert and apply jumpers as shown in the above diagram. Check Lcd prints because they can also be cause of Nokia 1616 light problem.
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