Haier L32B1120 Service Manual page 47

4) No sound
Check if the power supply
system is damaged, short
circuit or mis-connected
Check the volume control
circuit from U19
Check the volume input
circuit from to
U19
Check the
input
N
source
Reset
Y
volume
Check the
Y
speakers
N
Y
N
- 46-
No sound
Y
Check if there is sound input
signal
Y
Check if the volume control is
at 0 level or muted
N
Check if there is output at
J11
N
Check if there is +12V input at
PIN28 of U19
Y
Check if PIN7 of U19 is low
voltage
N
Check if there is signal input at PIN3
& PIN12 of U19
Y
Replace U19