Lenovo S960 Service Manual page 14

LENOVO S960 Cellphone Service Manual
Check whether the connections of the
main FPC connectors are OK.
Check whether the contacts between the
speaker spring clips and the sound
chamber stand are good.
Replace speaker. Retry to see whether it
rings.
Check whether analog switch U1403 on
motherboard has a dry joint problem or is
damaged. Repair soldering or replace it.
Try again to see whether it rings.
Check whether audio power amplifier U1401
on motherboard has a dry joint problem or is
damaged. Repair soldering or replace it. Try
again to see whether it rings.
Check PMU chip U1301. If it's damaged,
replace it.
3.3.2.2 SN audio power amplifier
It does not ring.
N
N
N
N
N
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Y
OK
Y
Replace the sound chamber stand.
Y
OK
Y
OK
Y
OK
Y
OK