Lcd Backlight Doesn't Light Up - Lenovo S960 Service Manual

LENOVO S960 Cellphone Service Manual
Check whether the connectors of the
LCD are attached correctly. Re-install
FPC. Check whether the cellphone
works.
Check whether the EMI components in LCD
channel on motherboard have dry joint
problems. Re-solder the EMI components.
Check whether connections between FPC
of LCD module and connectors on
motherboard are good. Reconnect them.
Check whether LCD backlight works.
Check whether the output of the backlight
circuit at the motherboard end is correct.
Check whether chip U1601 works.
Check whether the correct voltage is
applied on the positive and negative
backlight terminals of the LCD module.
Screen is blank.
N
N
Replace the LCD
module.

3.1.2 LCD backlight doesn't light up.

LCD backlight
doesn't light up.
N
Y
N
Replace the LCD
module.
Page 10
Y
OK
Y
OK
Y
OK
N
Replace U1601.
Y
OK
Y
OK