Picture OK, all
source no sound
Check the voltage of
pin 3,13 of U602
2.
1*
Repair the 12v supply
Check the pin 6 of u602
2.
1*
Check q607,q608,q609
1*
2.
Replace U602 or replace
the wire of speaker
check u601 and
volume control
Check the wave of PIN 4,12 of U602
Check the pin 7 of u602
2.
1*
repair R691 and R692
