After dis assambling Samsung GT-S6102 chek motherboard if there is any carbon water damage or rust.clean whole board with electronics cleaner and then apply hot air for a few.
Samsung GT-S6102 Display Light Ways, Jumper, Track, Path
Samsung S6102 Lcd Light Not Working Blinking Display Blank
Repair Samsung S6102 Light Problem
It will help you to solve Samsung S6102 LCD Display Light IC Solution Jumper Problem Ways
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