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No sound issue
Picture is diaplayed. But no sound
Take off the back cover and
check ifl wires of the speakers
terminals have been well
connected to the PCB-Main
and speakers ?
Yes
Are the voltages applied to
CN2①② of the power
supply unit?
Yes
Are the signals applied to
P23①②③④ of the
PBC-Main?
Yes
Are there signals on
the speaker terminals?
Yes
Speakers
No
No sound
No
No
No
PCB-Audio
①+15.5~16V ②GND
(CN2)
(P23)
①NC
②L
12
Check
Power supply unit
PCB-Main or PCB-I/O
PCB-Speaker
Connector
③GND
④R
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