Read LG MT-42PM13B (CHASSIS:RF-04GC) Service Manual online
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5-2. In case of does’t display the screen into specific mode
(1) Symptom
Ø
The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check follow
Ø
Check the all input mode should become normality display.
Ø
Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode. (Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
(4) in case of becomes unusual display from RF, AV mode
Is normal the Tuner?
Is normal the
CXA2069Q?
Is connected the Tuner
Cable corretly?
Connect the Cable correctly
Yes
No
No
Yes
Is normal the
VPC3230?
Replace the Tuner
No
Is normal the Input voltage, IIC
Communication and CVBS output?
Yes
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace the IC
No
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace the IC
No
Is normal the
CXA2089Q?
Yes
Is normal the
VPC3230?
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace the IC
No
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace the IC
No
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