If you have measured the ‘V’ fuse and there is continuity, the next things to check are the capacitor, diode and coil on the backlight line. The backlight capacitor is the first one just above pin number 1, and then the coil and boost diode are underneath the EMI shields. They are located immediately next to the PMIC. Follow the ‘V’ to the left and it is not under the first shield but the second one towards the top side of the board. Unfortunately there are no schematics available for this phone, however we have repaired many in the past :)