LG RT-29FA50RB, Service Manual

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No Picture / No Sound
Is any OSD displayed?
Check receiving system in MENU
& execute Auto - Program.
Does the auto - Program
Operate properly.
Store on manual - program MENU
Check 5V, 33V & IIC Bus Line
Of Tuner.
Is the CVBS signal OK.
(IC01 pin10 or 22)
Check R,G,B signal
At IC01, pin42,43,44
Check / Replace
CPT Board component
Go to
No Sound /
Picture OK
Check IC01 pin37,42,43,44
(IK, R,G,B)
Check / Replace
IC01
Check
5V, 33V &
IIC Bus Line
Check / Replace
IC01, Tuner
Check
CVBS signal Line
& IC01 Check IK
Signal at
IC01 pin37
(similar to CBVS)
No
No
No
No
No
OK
OK
OK
OK
OK
OK
OK
OK