LENOVO S960 Cellphone Service Manual
Page 19
3.5 Keyboard and keyboard backlight
3.5.1
Keyboard can’t work properly.
N
Side keys can’t
work properly.
Replace motherboard.
Check whether the solder joints of
the side key FPC are normal, and
FPC is broken. Do R1704, R1707
and R1303 have dry joint problems?
OK
Y
OK
N
The Power On button
can’t work properly.
Is the Voltage to Ground at PWRKEY
test point TP1112 is far less than the
VBAT voltage?
Check whether the main FPC
connectors are fastened properly, and
FPC is broken.
OK
Y
Replace the main
FPC.
Y
Replace the main
FPC.
N
Replace PMU U1301.
