Panasonic TH-42PZ80U

No Sound
No
Yes
Check the speakers.
(Make sure A12 is
properly seated).
No
35
Yes
Check the cable
between connector
A7 on the A board
and P6 on the P
board.
Is there 15V at
pin 1 of CN A6
on the A
board?
Is there a sound
waveform at pin 1
and 3 of CN A12
on the A board?
Replace
The A board
Warning: Disconnect AC Power prior to making any
disconnection or connection