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(2) no picture, no sound
Red
Check
the
power
board
No sound
Refer to (3) checking
procedure
(3) with picture but no sound
Check if the voltage of sound amplifier
of X106 in analog board is normal?
Yes
Check N112/N113 and
their peripheral circuit
No picture, no sound
Check the color of indicator
light
No picture
Refer to (4) checking
procedure
With picture but no sound
Yes
Check
if
the
pin2
N112/N113 inputs signals
Blue
Check the output voltage of
sockets X601~X603/X606/X608
Yes
Power board problem
No
Check the power board
of
No
Check
N103/NB05
their peripheral circuit
33
No
and
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