Read LG 32LG30 (CHASSIS:LA85D) Service Manual online
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3. Analog TV Video
4. Component Video
Check RF cable.
Check Tuner 5V Power.
IC710 #3 Pin
Yes
Yes
Check CVBS signal.
Tu400 #16 Pin
Replace IC710.
No
Check IIC Line.
Yes
Check other IC. (ex:LGDT, NTP, I/O)
No
Replace Tuner (TU400).
No
Yes
Check Mstar LVDS output
Replace Mstar(IC100).
No
Check Component Cable.
Check JK900/ JK901.
Yes
Yes
Check input signal format.
Is it supported?
Yes
Check signal IC903 output
R990, R991, R993
Replace Jack.
No
Check signal C1708, C1709, C1710,
C1711, C1712, C1713
Yes
Replace it.
No
Replace IC903.
No
Yes
Check Mstar LVDS output
Replace Mstar(IC100).
No
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