Hitachi L32A02A - Troubleshooting: Picture No Sound

OK
NG
Change speaker unit
OK
NG
NG
Change main
board assembly
OK
NG
NG
NG
OK
OK
TV has picture
but no sound
Press “Mute”function or
adjust volume up to check
the sound be mute or not
Check
speaker
unit 7~9
Check CN8-Pin1
&Pin2=22~24V
Change power
board assembly
Check U33-Pin13
&Pin18=22~24V
Check U31-Pin2=3.3V
Change main
board assembly
Check U32-Pin2=1.8V
Change main
board assembly
NG
Check U25-Pin1=8V
Change main
board assembly
END
Troubleshooting
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