How to Repair Sony Ericsson F305 : No Light Problem

For those of you who may have a problem that can not be solved in sony ericsson F305 handling the display backlight is not normal. Or display light does not turn on at all...

The first solution we have to do is change its flexi cable first. But I myself have experienced problems like this, where I've repeatedly change flexi cable, but hp is not normal too. Here I provide a solution through