After disassambly of Nokia X2-02 look at the motherboard for rust carbon or burren parts. If you found some rust or carbon apply electronics cleaner on the mother board and apply hot air to make it dry proper.
Applying too much heat can damage the mother board and parts.It also can be harm for your skin.So keep in mind about normal heat flow when making it dry.
Remove old LCD and Check it with new one. In above diagram you can see some different color lines that are pointing to the parts which are used in Display function of Nokia X2-02.
Check all these parts with help of meter and apply jumpers as shown in above diagram to solve display problem in Nokia X2-02.
If you find some broken and missing components then apply jumper on points where small circles given in nokia lcd problem solution.
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