Haier HL42B-B Service Manual page 55

No sound
Y
1st pin
CN20 is 18V?
Y
th
Is 45
U29 low?
Y
IS there input
of 2ed pin of
U29?
Y
Is there output
st
of 21 and 39
pins of u29
Y
Change speaker
N
of
N
of
N
N
th
56
Change power
board
Change U29
Change main board
Change U29