Samsung GT-B5330 Display Lcd Light Jumper Solution
Replace battery and test lcd light again,
make Samsung Samsung GT-B5330 display test,
Samsung GT-B5330 blank display.
If you have complete above steps and can not solve light problem in Samsung GT-B5330 then dis assemble the mobile phone and look at mother board for water damages and broken parts.
Make clean mother board with electronics clean and apply hot air with heat gun to make it dry.