Lcd Backlight Without Lighting - Lenovo A516 Service Manual

Repair Manual of Lenovo A516 Mobile Phone
3.1.2

LCD backlight without lighting

LCD backlight without lighting
Check whether the connection of FPC on
LCD module and connector on main board is
good and whether the LCD backlight is
normal after reconnection
Re-verify whether the LCD backlight is
normal after replacing LCD.
Check whether there are voltages more than
20V between both ends of C1606 when LCD
is lit.
Check the welding condition of U1601
and peripheral devices, including
L1601, D1601, ,R1620,R1609,C1607
Y
N
Y
N
Y
N
Y
11
OK
OK
If the backlight circuit is
normal, it is the problem
of LCD
OK