LG 42PC3RA Series, Service Manual

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7. Display the screen abnormally
(1) Symptom
1) Disp
lay the screen abnormally at specific mode.
(2) Check following
1) Noise appears at RF mode.
Is the Tuner part good?
Is the Tuner cable
connected well?
Are input voltage, I2C, and
CVBS output good?
Insert the cable exactly Exchange the Tuner
Yes
No
No
No
Is Gaskets added well?
Is added the ferrite core
at cable?
Add the ferrite core
Add the Gasket Re-assemble the SET
No No
No
Yes
No
Is arranged the cable
well?
Re-arrange the cable
(Don’t cross the cable above a X or Z board)
No
2) Noise appears at Side AV.