Nokia 1800 light solution

Light is very important for every cell phone.Now I share nokia 1800 light repairing tricks.This solution make for nokia 1800 decplay light problem and keypad light problem.Follow to the below picture.

How to do this work : first check positive volt on the coil. Next check transistor and diode next check light voltage on the diode positive side and last check red and yellow line.If all ok but transistor is damage then replace transistor.