Complete Fix Solution

If Nokia X3 keypad light is working but lcd light is not working this problem can be solved with a few jumpers that you can find in bellow diagram.So in first step check lcd jack and lcd.

if lcd jack is fine and there is no damages or rust on it you can check with new lcd. If new lcd shows same result apply jumpers as given above diagram it will help you to solve Nokia x3 lcd light problem while keypad light already lighting.
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This is solution of nokia x3-02 touch screen not work solution.First re-solder then see result if problem still then replace this ic.