Nokia 1202 light solution

This is Nokia 1202 Problems with lights solution.Many time may damage nokia 1202 lcd and keypad light light.when damage while not part phone.lcd light light light and the keyboard connected to the serial line for any problem line, then there is light. How to make this work: first check volts on capacitor.if positive light not you see voltage on the capacitor and check the light IC replace any part of parts.If coil.damage voltage is 10v or more in the capacitor but problem then check forms of light.