Read LG 60PC4R-TB (CHASSIS:PP7AB) Service Manual online
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3-2. In case there is no display on the screen in specific modes
(1) Symptom
1) There is no screen display from a specific input mode
(RF, AV, Component, RGB, DVI).
(2) Procedure check
1) Check the all input modes have normal display.
2) Check the video(main)/ data(sub), video(main)/ video(sub) have normal
2) Check the video(main)/ data(sub), video(main)/ video(sub) have normal
displays from the PIP mode or Double Window mode(re-check it/ swap).
(3) In case of an unusual display in RF mode
Is the Tuner normal?
No
Yes
Yes
Re-insert the cable
Replace the Tuner
Replace the IC611
Is the Tuner Cable
connected?
No
Are the Input voltage,
IIC Communication and HV
sync normal?
No
No
Are the Input voltage,
IIC Communication and CVBS
output normal?
No
No
Is the IC611
normal?
Replace the IC800
No
Are the Input voltage,
IIC Communication and HV
sync normal?
No
Is the IC800
normal?
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