Read LG 47LB9R1 (CHASSIS:LP7AB) Service Manual online
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2-2. In the case of doesn't work normally at specific input mode
(1) Symptom
1) The screen doesn't work normally at specific input mode (RF, AV, Component, RGB, HDMI)
(2) Check follow
1) Check the all input model if all input display normally.
2) Check the PIP and Double Window if it display normally.(Re-Check it Swap)
(3) In case of unusual situation from RF mode
Is the Tuner normal?
No
Yes
Yes
Cable inserts well.
Replace Tuner
Replace IC611
Is the Tuner Cable
connected well?
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
No
Is normal the
Input voltage, IIC
Communication and CVBS
output?
No
No
Is the IC611
normal?
Replace IC800
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC800
normal?
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