Read LG 32LG3DCH (CHASSIS:LA76B) Service Manual online
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13. Component/ RGB/ AV Audio
12. Pillow Speaker
Check video output
Y
Follow procedure external
input video trouble
shooting
N
Check Connector
JK601 (Component)
JK605 (RGB)
JK600 / JK500
(AV Rear, AV Side)
JK601 (Component)
JK605 (RGB)
JK600 / JK500
(AV Rear, AV Side)
Replace connector
N
Y
Check signal
R620,R621(Component)
R638,R639(RGB)
R613,R614(AV Rear)
R668,R667(AV Side)
Replace it
N
Y
Check Q711 power voltage level 16V
Replace it
N
Y
Maybe NTP3000A has problems
14. HDMI Audio
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure HDMI video
trouble shooting
N
N
Maybe NTP3000A audio block has
problems. Replace it
Check EDID NVRAM (IC800)
Power #8 & I2C Signal (#5, #6)
Replace it or redownload
Y
N
Chec k m ai n
s p ko ut p ut
Fo llo w p ro c ed ure All so urc e aud io t ro ub le
sho o t ing
Y
Fo llo w p ro c ed ure aud io t ro ub le
s ho o t i ng
N
N
Mayb e NTP3000A aud io b lo c k has
p ro b lem s. Rep lac e it
Chec k IC1204
Rep lac e i t
N
Y
Chec k SW1200
Rep lac e i t
N
Y
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