Check the condition of connectin of the input CVBS Audio R/L. Check the condition of soldering state in CVBS Audio R/L & input part Check the short point in signal line. Check for short circuits between each power terminal and the ground.
B
No Sound in CVBS Audio R/L
#2,4 at U45 in Main B/D
NG Check CVBS Audio input part
Waveform 28
C
#56,57 at U50 in Main Board
NG
Check U45 & input part of U50
Waveform 29
#11,15 at U200 in Audio Amp Board
D
NG
Check U50 and Y5 and related circuit
Waveform 30 #28,31,27,24 at U200 in Audio Amp Board