Polaroid FLM 3701 - 37" LCD TV Service Manual page 26

3.no sound
Check if PIN1 and PIN2
is 18V of XA12
Check if PIN2 is 12V of
XA09
no
Check power supply
yes
yes
no
Check PIN67 wave of NA01
Check PIN5 and PIN8
output wave of NA03
no
Check PIN27 and
PIN28 output wave of
NA01
no
no
Replacing TUNA01
23
yes
Replacing NA04
yes
Replacing NA03
yes
Replacing NA01