Read LG 42LH200C / 42LH210C / 42LH220H (CHASSIS:LP91Z) Service Manual online
- 14 -
Block A
Is video output of
the Tuner normal? (Check
TU500_Pin13)
Is the LVDS
Cable connected?
well
Is the input voltage
normal? (Check Pin 3)
Check the Tuner.
Check the power.
Change the IC(IC800)
NO
YES
NO
YES
YES
NO
Is the I2C communication normal?
(Check Pin9, Pin10)
NO
Cable inserts well.
3. Unusual display from TV/CATV mode
Does minute discharge
at Module?
Is the link cable
normal?
Replace the Power board.
Reconnect Panel line cable.
( P401/P402)
YES
YES
NO
NO
Is output the normality
Low/High voltage except
Stand-by 5V?
Low/High voltage except
Stand-by 5V?
Is the inverter
/ VaVs on?
NO
Check the LCD Module
YES
Is the Q1103's
output normal?
Replace the Q1103
NO
2. No Raster
(1) Symptom
- No OSD and image occur at screen.
- It maintains the condition where the front LED is blue
- It maintains the condition where the front LED is blue
(2) Check pocess
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